Plato was the greatest philosopher-student of Socrates. His impact was vast and was one of the main authors of Socrates' ideas. He started the greatest school of philosophy in Athens, the Academy. In addition to his scholastic contributions, he answered the question of what is temporal and what is eternal. To Plato, all material is finite and thus "flows" or changes (i.e. dies, decomposes, etc). What we sense then "flows". He determined that material things must come from "something" that reminds material to compose in one way and not another (e.g. a horse and not a crocodile). This "something" must be eternal and Plato called it the form. Thus, a pine cone is finite/temporary while the concept of the circle that it mimics is eternal. We sense such concepts with our reason, making reason eternal. The eternal was more important to Plato than the things that "flow" or change. Reason is how we access the eternal. Thus, reason is more important sense perception - this belief is the core of "rationalism". Plato's legacy was continued by the advancements of his student, Aristotle.