And he must have done a really great job because Alexander the Great goes on to conquer the Western world. Alexander the Great is said to reward Aristotle with all of these awesome resources where Aristotle is then going to go back to Athens and start what's called Lycaeum, a new school with a great library that's borrowed in much from Alexander the Great. Now, Aristotle is going to be a little bit different than his teacher, Plato. Plato was focusing much on the ideas of idealism, of truth, of form, and Aristotle is a little bit more scientific based. He's looking at the empirical data, at what's observable, but at the same time period he said that happiness is the goal of life. One of the biggest teachings under Aristotle is going to be called the Golden Mean and basically whenever you're examining something, let's say you want to be a great conversationalist, there's always something in the middle. You can be a bore, you can be really boring.