ARISTOTLE: THE MOST METHODICAL MIND OF THE ANCIENT WORLD

Aristotle (384-322 BC) was the most methodical mind of the ancient world. In fact, he was the founder of logic, which for him was an instrument of philosophy.

Aristotle's logic was based on the assumption of the existence of categories and meanings. The former correspond to normal things and the latter to their essence. Thus the acquisition of knowledge is based on meanings, which are being conceived under conditions that are in the senses.

The philosopher also distinguished knowledge into direct and indirect. The first is acquired insightfully while the second by observation, experience and subtraction.

Unlike Plato, Aristotle did not believe that ideas pre-existed. On the contrary, he believed that the human spirit has the ability to create meanings and with them to perceive reality.

As for the above-mentioned categories of normal things, these for Aristotle were the following ten, which he explained by describing a man, Korikos:

1) Substance (human)

2) Quantity (three bars)

3) Quality (white, educated)

4) Relationship (older)

5) Place (in the market)

6) Time (yesterday)

7) Position (sitting)

8) Condition (dressed)

9) Energy (cuts)

10) Suffering (cut)

Judging the Platonic theory of ideas, Aristotle considered as its disadvantage the division of reality into tangible and conceivable. So he preferred to deal with the perceptible reality and to look for the essence of beings within the specific objects.

Aristotle, knowing the views of the prosocratic natural philosophers and conducting physiognostic and biological research himself, came to the conclusion that things are specific combinations of matter and form, which he considered to be eternal and unchanging.

Extremely interesting is Aristotle's theory of man's ability to create poetry. In fact, the philosopher distinguished poetry on two different levels: The technological level of poetry aims at the creation of objects that complement nature. The artistic level aims at the interpretation of existing objects.

In Aristotle's natural philosophy, the teleological criterion is of particular interest. According to this, nature creates beings who aim at their self-realization. This is achieved through the optimal combination of form with matter. Therefore form is the purpose of creation.

At the level of natural philosophy, Aristotle was also interested in investigating what is happening in things. He therefore dealt with concepts of physics such as mass, space, time, motion, change, infinity, emptiness and continuum. He also founded biology and other related disciplines, such as phytology, zoology, entomology, embryology, ecology and animal psychology. He also suggested species classification methods and investigated the causes of sex differentiation, hereditary and acquired traits, polygon and oligogene, polycythemia and gestational age in animals, the spread of certain species and the effect of natural environment in the ethos of animals, their mental manifestations, their habits, weather effects on them and their diseases. Many of Aristotle's discoveries in the science of biology were discovered and accepted by lots of modern scientists, many of whom were unfamiliar with the work of the ancient philosopher.

As for the place of man in the animal kingdom, the great Macedonian philosopher acknowledged with arguments the undoubted superiority of the human species over other animals, although he accepted his biological relationship with them. As characteristics of human superiority he set the upright posture, the upright gait, the construction of the hand, the articulate speech and the conscious thinking. He also observed that the unique characteristics of man that contribute to his superiority are the ability to perceive the concept of time and measure it, the ability to remember himself, the ability to think about issues that concern him, the ability to choose, his laughter and his heart beats due to mental causes. Finally, without questioning the greater physical strength of many other animals compared to man, he observed his inexhaustible spiritual power, which allows him to achieve his goals.

Aristotle was also concerned with the issue of the soul. He dealt with the soul not only from a philosophical point of view but also from a biological, epistemological and moral point of view. He even expressed the view that "The soul is the first end in itself of a physical body that has life in it." In addition, he believed that the soul is for man what it is the form for matter. Finally, the philosopher distinguished three types of soul: the vegetative (of plants), the sensitive (of animals) and the rational (of humans).

On the issue of ethics, Aristotle, disagreeing with Plato and Socrates, argued that it is not based on the knowledge of good but on the practice of good, since it leads directly to happiness.

At the level of ethical philosophy, Aristotle dealt particularly with the subject of friendship, which he researched as a moral phenomenon. Friendship is about both the relationship between the casual passengers of a ship and the relationship between members of a family or between a person and himself.

At the level of political philosophy, Aristotle argued that a human being can be morally complete only in a society or otherwise that man is a "political animal". In fact, he believed that the goals of the individual and the whole are always identical in an organized society.

At the level of political philosophy, again, Aristotle distinguished two different types of classification of the citizens of a society. He first divided them into farmers, craftsmen and merchants. His second categorization ranked them as rich, poor and middle class. The philosopher thus stated that the relations between these social groups determines the state.

Aristotle distinguished three typical types of regimes and three deviations from them. The first are the kingdom, the aristocracy and the democracy. The latter are tyranny, oligarchy and mob rule. Nevertheless, like Plato, Aristotle ultimately considered that there are essentially only two kinds of regimes: that which serves the good of society and that which serves only the good of the lords.

However, Aristotle supported the idea of a society where the middle class prevails and where everyone is equal before the law. Finally, the Macedonian philosopher was the first to support the principle of separation of powers and that of the majority.

As an epilogue it is noted that Aristotle was the teacher of Alexander the Great.

 Finally, in modern Greece, the largest university is named after the great philosopher: It is the Aristotle University of Thessaloniki.

WHAT DID SOCRATES SAY?

The theories of the sophists did bring the human soul to the center of philosophical thought, but they provoked the feeling of uncertainty in the people of their time. This is what Socrates came to face (470-399 BC).

Socrates was not a professional teacher, as the sophists were. Instead he used to develop his thoughts, through dialogue, in places like the market, workshops and gyms.

According to Aristotle, the method by which this philosopher was trying to discover truth and knowledge was as follows: He was asking his interlocutor about questions that were always concerning man and then was judging his answers by checking their validity.

Socrates was very interested in the subject of ethics, which he was considering to be based on logic and to be independent of religion and custom. Unlike the sophists who were believing in the relativity of things, Socrates was arguing for the existence of good and evil. He was believing, then, that no one chooses evil when he knows what he is doing. Thus he came to the conclusion that virtue is based on knowledge, which is instructive.

Socrates was considering the beauty of the soul to be good and beneficial for man, which, in his opinion, was surpassing other goods such as physical strength, health, external beauty, pleasure, wealth and glory.

The teaching of Socrates contributed to the internalization of man and to the projection of the imaginary world as of special value. However, his morals were not ascetic because he was not disregarding human nature.

Without the philosopher himself seeking it, his students created their own schools, based on his philosophical theories. However, each of them evolved with the personal tendencies of its own representative.

THE TURN OF SOPHISTIC THOUGHT TO MAN AND HIS SOUL

The 5th BC century was undoubtedly a time of important historical events and intellectual achievements of the Greek world. Between the Persian and the Peloponnesian War, architecture, painting, sculpture, theater, philosophy, rhetoric presented an admirable activity of a high level. The center of the cultural flourishing of the Greek world of the 5th century was the city-state of Athens and this century became known in history as the Golden Age of Pericles.

The focus of the philosophical thought of the golden age presents a significant shift. There is a decrease in its cosmological interest and a turn towards man and his soul. The philosophical movement that first dealt with these great issues was the sophistry.

The sophists were interested not only in the issues of human knowledge and practice but also in psychology, behavior, positions and relationships within society, social phenomena and culture. They were moving from city to city to teach as professionals rhetoric, dialectics, ethics, political theory, mythology, music theory, astronomy and meteorology. Their goal was to make their students as capable as possible in thinking, speaking and acting, in order to be as successful as possible in their lives and to contribute to social developments.

The father of sophistry was Protagoras (490/485 - 420/ 415 BC), who supported the uninterrupted variability of things. He believed that things can not be said to be one way or another but that they are as everyone sees them at every moment. He also argued that man can know nothing about the gods because they are invisible and human life is short.

Another extremely important sophist was Gorgias (490 / 483 - 380 / 376 BC). He opposed the Eleatic belief that facts are almost illusions and defended common sense and the daily experience of people as the only criteria for knowledge. He also argued that the human crisis is based not on objective truths but on current, unproven and often contradictory perceptions and prejudices. The denial of the absolute truth, led Gorgias to the belief that man has no knowledge but only an opinion of reality.

Gorgias was the first philosopher who strongly believed in the power of speech. So at first he turned his attention to rhetoric, which was for him a way of convincing man of what the rhetor was seeking each time. He was, therefore, the first to study the effect of speech on the human psyche. He stated that "speech can stop fear and sadness, can activate joy and can increase compassion". He argued that  speech is for the soul what drugs are for the body. He said that art, magic and religion are based on the same principle as speech, which seek to "charm" the soul and "transform" it into the state they want.

A third important sophist was Antiphon (480 BC - 410 BC). He argued that nature and law are opposite. Nature does not distinguish between Greeks and barbarians, free and slaves. For his happiness someone must give importance to natural law over man's law.

Other important representatives of sophistry were Prodicus, Thrasymachus and Kritias. The latter was the first to deal with the forms of states, the discoveries and the history of civilization. Finally, Hippias was the "encyclopedist" of sophistry. He wrote introductions to dialectics, geometry, astronomy, music, rhythm and dealt with problems of art theory, prehistory and linguistics.

The importance of sophistry was that it brought to the center of the study man, his knowledge and practice, founded dialectics and logic, initiated psychology, took an interest in social problems and studied the origin of language, art and culture in general.

THE BIRTH OF THE ATOMIC THEORY IN GREECE OF THE 5TH B.C. CENTURY

One of the most important achievements of ancient Greek thought of the 5th century BC was undoubtedly the genesis of the concept of the atom, this tiny amount of matter that has occupied scientists and philosophers for thousands of years.

The important current that first conceived this idea was the atomic philosophy. Its representatives studied with the "Dorian" Eleatan philosophers but also opposed them. They therefore accepted the doctrine of their teachers that "BEING" is unborn and incorruptible but at the same time claimed that it moves and is divided.

Atomic philosophers first acknowledged the coexistence of emptiness and non-emptiness in the universe. The existence of a vacuum is a necessary condition for the possibility of division of physical bodies. However, they rejected the view of Zeno the Eleat about the infinite division of bodies. That is, they supported the existence of finite molecules of matter, which can not be further cut and remain atoms. Thus the theory of the atom was conceived.

The most important atomic philosopher was Democritus (470/460 - 400/390 BC) from Abdera in Thrace, the most versatile and methodical mind before Aristotle. He dealt with issues of physics, epistemology, human behavior, social and political organization.

Democritus defined the atom as unborn, incorruptible, unchangeable, complete and perfect, uniformly compact, free from emptiness, simple, unified and amorphous, without fluctuations, dilutions and densities or expansions and contractions, indivisible and with definite boundaries. In his opinion, atoms were infinite in number and shapes and moved eternally into space.

An important difference between the theory of Democritus and that of the Eleats was that the former meant substance not metaphysically but materially. At the same time, he considered the phenomena of nature not as an illusion of people but as something that happens around the essence.

As for how a world is created, Democritus taught that it is composed when in a large space void many atoms collide with each other to form a vortex. In the vortex, similar atoms are attracted to each other and form known physical bodies such as fire, water, air and earth. Then the heavier materials gather in the center and create the earth while the lighter ones are pushed towards the periphery creating the celestial bodies and the meteorological phenomena. Thus infinite worlds are synthesized and decomposed. In fact, he defined as their way of destruction the fall of one world over another. Finally, he argued that in some worlds there is no sun and moon while in others there are many such celestial bodies. In addition, the philosopher believed that in many worlds there are no liquids, animals and plants.

Democritus also formulated positions in the field of biology. Thus he argued that the skills and organs of the various animals were created by chance and that only those organs that seemed necessary to preserve each species were saved. The philosopher also considered every living organism as a small world.

As for the soul, Democritus considered it as a physical body, with a composition like fire, he identified it with the mind and believed that it wears together with the body.

For knowledge, the philosopher taught that it is related to the situations that surround each person and that the truth is at the bottom, that is, in the void and in atoms. The process of knowledge was for him a natural mechanism, which in fact was based on the "dark" sense and the "genuine" intellect. For the second to exist, a necessary condition was the existence of the first, as Aristotle later believed.

Finally, a characteristic formulation of the philosopher about the importance of teaching was this: "Teaching is close to nature because it restructures human nature and thus creates a new nature."

Today, about 300 excerpts from numerous books by Democritus survive.

2 DORIC PHILOSOPHICAL CURRENTS THAT DIVIDED THE WORLD IN THE REAL AND THE PHENOMENON: PYTHAGORIANS AND ELEATS.

It is true that European philosophical thought was born by the Ionian materialist philosophers. But in every spiritual activity that begins to exist, there is usually continuity. Actions converging and diverging in relation to the initial course, come to contribute to its development.

In contrast, then, to the first philosophical achievements of the Ionian spirit, came the answers of the Doric one, from Greeks of Lower Italy. In fact, the aristocratic, theocratic and puritanical views that were gradually expressed, departed from the materialistic direction and led to a more transcendental, mystical view of the world.

The Orphic and Pythagorean philosophers, therefore, led by Pythagoras (570-496 BC), subjugated the physical world to a transcendental reality, projecting on the concept of the physical body metaphysical beliefs related to the soul. The Pythagoreans expressed the belief in the distinction between body and soul, between the apparent and the real.

A special feature of Pythagorean philosophy was the attachment of greater importance to numbers than to bodies in the study of the physical world, leading philosophical thought to a kind of mysticism. Essentially, the Pythagoreans deified the numbers, as shown in their following text:

"We must consider the works and the essence of the number according to the power that is in the decade. So, great is the power (of numbers) and complete and omnipotent and divine and heavenly life's and human's principle and guide etc .. And without it, everything is infinite and invisible etc .. No lie is accepted by the nature of the number, etc. "

In response to the beliefs of the Materialists and the Pythagorean philosophers came that of the Eleats, led by Parmenides (515-440 B.C ..). His point of view came in reaction to the motile universe of Heraclitus. He ruled out the beginning and the end, the birth and the death, the increase and the decay, the movement and the change, the division and the discontinuity of the Heraclitic being. This is how he explained the physical world as an apparent world.

The Pythagorean and Eleatic philosophers caused the division of the concept of the materialistic life of the Ionian philosophers into matter and energy, leading to the birth of spiritualism and materialism.

4 ANCIENT GREEK PHILOSOPHERS SEARCH FOR THE PRINCIPLE OF THE WORLD

The archaic era of Greek history was very important for the evolution of Greek and European culture. The main reason is that then the foundations of philosophical thought were laid. The general social and political conditions in the life of the Greeks contributed in this direction. In the 6th century BC the kingdom and the aristocracy were set aside. New social classes, such as those of the merchants and artisans, emerged between the ranks of the wealthy landowners and the poor workers. In the context of social change, the way of thinking has changed. Belief in myth ceased and the human mind began to wonder about nature, spirit, knowledge, practice, society and the law. A special field of intellectual creation that is a testimony to the new spiritual interests of the Greeks of the archaic period is their lyric poetry.

Until the 6th century BC the Greeks tried to attribute the creation of the world to anthropomorphic deities, for whom they had created a rich set of myths. The first steps of philosophy were based on these myths. So the first perception of the series of events that gave birth to the world was this:

1) Initially there was a chaotic situation.

2) The chaotic state was fertilized by some sperm.

3) The produced material result was divided into parts.

4) Then the celestial bodies and the phenomena were formed.

5) Life was born.

The first important philosopher to attempt to interpret the world was Thales (625-546). He considered water as the beginning of the world. After traveling to the east gaining rich knowledge, he systematically engaged in astronomy, mathematics, geography and engineering. In place of the mythical deities of the seas and rivers, he put the natural element of water as part of the world, arguing that it has life in it and favors its development.

In 610 - 546 BC the philosopher Anaximander also lived. He set "Infinity" as the beginning of the world, which expressed the physical existence of the mythical entities Chaos, Night, Air, Ocean. Beginning with infinity, Anaximander proceeded to formulate the concept of the Incorruptibility of Matter.

Anaximander's version of the creation of the world is interesting. He considered that from "infinity" was secreted the "fertile", that is, the sperm of the hot and the cold. Thus a cold nucleus that eventually formed the earth's mass was surrounded by warm material, which exploded creating the rest of the celestial bodies. Anaximander considered temperature transitions as a mechanism for the creation of life. Finally, Anaximander was the first to claim that man came from other species of animals.

Anaximenes (585-525 BC) considered air as a basic element of the world and believed that all material bodies and natural phenomena are created by its thickening and dilution. By air he meant matter and energy together. He also taught that the air was before the birth of the universe and remains forever its basic essence, advancing the issue of cosmogony in cosmology. Considering hot, cold, wet and dry as states of the air, he tried to understand the qualities of matter and the explanations of quantities.

Heraclitus (540-480 BC) was the fourth and most important materialist philosopher of the archaic era. This philosopher considered the universe as a fire that transforms into various forms. He also taught that "Τhis world, the same for all in general, neither god nor man made it but it has always been and is will be an eternal fire, which lights up in moderation and goes out in moderation."

Explaining the structure of the world, the philosopher formulated the notion that fire first turns into sea and half of it into land while the other half into currents. All this becomes fire again.

One of the well-known views of Heraclitus was that "Everything changes and nothing remains constant."

6 GREAT FEMALE SCIENTISTS OF ANCIENT GREECE

After my reference, in a previous post, to creative women of fine arts in Ancient Greece, I would like to refer to six important ancient Greek scientists.

Let's start with Aglaoniki, the daughter of the king of Thessaly, Igitor. This was the first female astronomer in Greece. Apollodorus writes that Aglaoniki could accurately calculate the time of the eclipses of the Sun and the Moon. She was helped by the Chaldean eclipse cycle, which she modified.

In modern times the name of the ancient Greek astronomer was given to the homonymous crater of the southern hemisphere of Aphrodite.

The next memorable Greek scientist was the doctor Agnodiki, who lived in the 4th century BC. century. At that time, women were not allowed to practice medicine, so in order to study it, Agnodiki disguised herself as a man and thus presented herself at the University of Alexandria. The Greek doctor later began to practice her profession, continuing to be disguised as a man. To her clients, of course, her secret was confessed. As her reputation for scientific success grew, the jealousy of her fellow doctors against her began to grow. She was therefore falsely accused of having illicit relations with her female patients. Thus, Agnodiki was forced to reveal that she was a woman, a fact that led her to trial. At the trial, all the women who were treated by her defended her. Thus Agnodiki was acquitted and the law on the abortion of women in medical science was repealed.

Aspasia was another exception of an ancient Greek woman who dealt with medical science and more specifically with gynecology and obstetrics. Her views and techniques were so remarkable that they were adopted by various doctors and surgeons of the Byzantine period.

Aspasia introduced her own surgical techniques for uterine hemorrhoids, varicoceles, and hydroceles, both of which are similar to recent, modern methods.She developed a technique for moving a breech baby to ease delivery.She also worked on preventive medicine with pregnant women.

Antiochis was a Greek physician and pharmacologist from Lycia. She became known for her book "Syntagologio". Her work was recognized by her compatriots, who in the 1st century AD erected a column in her honor with the inscription:

"For Antiochida, daughter of Didotos from the city of Tlos,

recognized by the Parliament and the Municipality of the city of Tlos

for her experience in medical science

this column has been set up. "

Cleopatra was a woman with excellent knowledge of Chemistry. She is known for her work "Gold production". Another well-known work of hers was "Cosmetics". In it he wrote about cosmetics, hair dyes, prescriptions for alopecia, hair loss, hair growth etc.

Finally, the famous Hypatia, the daughter of Theon, who was born in Alexandria in 370 AD, should definitely be mentioned.

In 392 AD Hypatia traveled to Athens, where he studied at the Neoplatonic School of Plutarch the Younger and his daughter, Asclepigenia. She also studied with Proclus and Hierocles. Then she went to Rome, where she continued her studies impressing with her intelligence and eloquence.

In 398 Hypatia returned to Alexandria, where he taught mathematics and philosophy. In 400 he succeeded Plotinus in the seat of philosophy at the Museum.

Isichius the Jew, who was her student, wrote about her:

"She was wearing the simple cloak of the philosopher and was running through the center of the city, publicly explaining the texts of Plato and Aristotle to those who wanted to hear them."

Hypatia produced a rich body of work on mathematics, astronomy, engineering and philosophy. Unfortunately this was destroyed by the burning of the library of Alexandria. Some of its excerpts were saved in works by other authors.

Hypatia also built a device for refining water, an instrument for measuring water level, and a graduated bronze hydrometer for measuring the specific gravity of a liquid.

Hypatia's insistence not to embrace Christianity, its teaching and its involvement in the political life of Alexandria, turned the Christian leadership of the city against it. Thus in 415 AD, under the orders of Cyril, the Patriarch of Alexandria, a fanatical mob of Christians violently dragged her into the streets and executed her with shells and shells.

The death of Hypatia was considered the end of ancient science.

9 PAINTRESSES OF ANCIENT GREECE

Greeks but much more foreigners when thinking of ancient Greek culture, associate it almost exclusively with male historical figures. Indeed, the position of the majority of women in ancient Greece was at home. However, there were some women who, breaking the status quo of the time, dealt with creative areas of the human spirit, thus gaining an important place in the history of human civilization.

Since I personally love the art of painting, I would like to mention briefly, in the first phase, some Greek women artists who were distinguished in this field in antiquity.

So, let's begin with Alexandra. 

Alexandra was the daughter of the Greek painter, Neokles and lived

THE HISTORIC ISLAND OF DELOS: Images from the interesting Greek TV programme "The time machine" ("Η μηχανή του χρόνου").

Most foreigners visiting Greece usually have in mind various cosmopolitan islands that are offered for tourism and entertainment. But how many people know the enchanting island of Delos in the Cyclades complex?