Friendship is two souls inhabiting one body.

Plato is my friend, but truth is a better friend.

Philosophy begins with wonder.

Good moral character is not something that we can achieve on our own. We need a culture that supports the conditions under which self-love and friendship flourish.

The so-called Pythagoreans, who were the first to take up mathematics, not only advanced this subject, but saturated with it, they fancied that the principles of mathematics were the principles of all things.

Happiness is an activity of the soul in accordance with virtue

The one exclusive sign of thorough knowledge is the power of teaching.