Plato

Human behavior flows from three main sources: desire, emotion, and knowledge.

A good decision is based on knowledge and not on numbers.

The greatest wealth is to live content with little.

Plato was born in Athens. He was younger than Socrates, more specific he was the generation after him.

There's evidence about his written work that claims about only 24 authentic dialogues. Many of modern authors believed that twenty-eight dialogues and just two letters were written by Plato but other thirty-six dialogues have a lot of defender. Socrates has the main role in his dialogues. Platos` political doctrine is explained in his: "The Republic","The Laws" and "The  Statesman". He learned that justice in the cities is only possible if the philosophers were kings.

Except about politics Plato spoke and about of metaphysics throw his learning about the theory of forms. He uses allegories in explanation of his ideas. The main allegory of him is the Allegory of the Cave. In this allegory he spoke about humans or most of humans tied up in a cave. That people look only at shadows on the walls and have no ideas about reality. If they turned around they would see what is actually the casting of the shadows. If they left that place they would see reality illuminated by the sun. When they from outside came back in cave they would tell others what they saw but no one believed. This allegoric speak about the view that philosopher-kings are wisest while most humans are most ignorant.