Teaching Alexander the Great gave Aristotle many opportunities and an abundance of supplies. He established a library in the Lyceum which aided in the production of many of his hundreds of books. The fact that Aristotle was a pupil of Plato contributed to his former views of Platonism, but, following Plato's death, Aristotle immersed himself in empirical studies and shifted from Platonism to empiricism.[4] He believed all peoples' concepts and all of their '''knowledge''' was ultimately based on perception. Aristotle's views on natural sciences represent the groundwork underlying many of his works.
