No intelligent man will ever be so bold as to put into language those things which his reason has contemplated.
One cannot make a slave of a free person, for a free person is free even in a prison.
He who can properly define and divide is to be considered a god.
True friendship can exist only between equals.
Worthy of honor is he who does no injustice, and more than twofold honor, if he not only does no injustice himself, but hinders others from doing any.
There is a ... matter - much more valuable and divine than natural philosophy . ... On this matter I must speak to you in enigmas.