Plato - is the greatest philosopher of the ancient world, he is Socrates' pupil, Aristotle's teacher, the founder of the religious and philosophical union, which got the name of Academy. Plato's influence on the following world thought in the sphere of philosophy, theology and linguistics is grandiose: he stated the absolute reality of the abstract notions and he thought that in the basis of the universe lay not things, but ideal conceptions about them.