Thales - Deepstash
Thales

Thales

  • Thales is best remembered for his metaphysics which argued that everything originated from water and that water somehow constituted all other elements. He left no writings.
  • Thales devoted time to astronomy and was the first person to predict a solar eclipse accurately. 
  • He was a noted mathematician and is said to have measured the height of the great pyramid using the length of its shadow. 
  • He was credited with discovering magnetism in the west and used it as the basis of his theory of Panpsychism. 
  • While many of his inspirations and sources were mythic, Thales is said to have moved beyond myth and towards naturalistic explanations of the world.

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The founder of the Stoic school of philosophy, Zeno was heavily influenced by the Cynics.

Initially a wealthy merchant, he became interested in philosophy during a trip to Athens and grew to be a highly regarded teacher. 

Stoicism is a philosophy dedicated to helping its students live the good life. The ancient Stoics believed the universe had a rational, perhaps divine, structure to it and held that while the laws of physics dictated what happened externally, we were still free to choose how we would react to it. They argued that a rational man should strive to live virtuously, and devoted a great deal of time to the question of ethics.

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Parmenides

He was one of the most influential pre-Socratic thinkers.

Parmenides argued that change was an illusion based on our faulty image of reality. He explained that nothing could be created or destroyed and everything was really “one being." That is, all substances are part of the same larger whole.

As he thought that it was impossible to conceive of “nothingness" he also argued that empty space was an impossibility. This lead him to declare motion to be impossible, as any movement would require empty space to move into.

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Heraclitus

A philosopher active around 500 BCE, that wrote a book; this gives us a direct path to his thoughts. He felt that wisdom should be earned, he wrote obscurely, so much so that his book was challenging to read.

He developed a cosmology. His cosmos has no beginning or end and is fundamentally made of fire. This fire can transform to become water, earth, and air. It is always in flux but keeps the elements in proportion. This constant change was the way of everything and was needed to keep the world stable. 

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Diogenes of Sinope

Diogenes founded the Cynical school of philosophy, a school dedicated to simple living and virtue. Advocating a simple, disciplined, self-sufficient life, Diogenes lived in a large jar and owned nothing but a cloak and staff. He begged for food and avoided luxuries like the plague.

He is said to have written a few (lost) essays but is better known for using actions to educate. He would walk down the street backward in an attempt to make people question why they walked forwards and begged from statues to show that he was not concerned with rejection.

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Pythagoras
  • Pythagoras was a Greek mathematician, philosopher, and mystic. He is best known for the similarly named theorem.
  • He did most of his work in southern Italy and wrote nothing down.
  • Pythagoras was a sage who founded a small religion of devoted followers.
  • While he probably didn't prove the theorem that bears his name, he is said to have known “the truth of the theorem" and made an enormous sacrifice to the gods in honor of the discovery. 
  • His mystical approach to numbers also lead him to discover the relationships between harmonic notes in music and attempt to describe the world regarding math; an activity science carries on to this day.

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He was a pioneer of the reductio ad absurdum argument. Aristotle credited him with co-inventing the dialectic method of philosophy.

He is best remembered for his paradoxes. His best-known paradox suggests that movement is impossible. He asks us to imagine a runner on a track. He notes that before the runner can run the whole length, they must first run the first half, then a quarter, then an eighth, and so on.

Several potential solutions have been put forth to his paradoxes and debate continues to this day. The potential answers to his paradoxes have influenced discussions about time, space, and how we perceive reality.

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Ancient Greek Philosophy
  • Ancient Greek philosophy extends from as far as the seventh century B.C. up until the beginning of the Roman Empire, in the first century A.D.
  • It distinguishes itself from other early forms of philosophical and theological theorizing for its emphasis on reason as opposed to the senses or the emotions.
  • During this period five great philosophical traditions originated: the Platonist, the Aristotelian, the Stoic, the Epicurean, and the Skeptic.
  • Favorite themes include the principle of reality, the good; the life worth being lived; the distinction between appearance and reality, etc.

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Nihilism means "nothing." It is the lack of belief in meaning or substance in an area of philosophy.

  • Moral nihilism argues that moral facts cannot exist.
  • Metaphysical nihilism argues that we cannot have spiritual facts.
  • Existential nihilism is the idea that life cannot have meaning and nothing has value.

Nietzsche was not a nihilist but wrote about the dangers posed by this philosophy.

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Plato: the influential philosopher

Plato was originally named Aristocles (not to be confused with Aristotle). Plato was born in Athens around May 21 in 428 or 427 B.C.

Plato was a student and follower of Socrates. It is through Plato that we are most familiar with Socrates' philosophy. Plato wrote dialogues in which his teacher took part, usually asking leading questions - known as the Socratic method.

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