The wisdom of men is worth little or nothing.

Lessons, however, that enter the soul against its will never grow roots and will never be preserved inside it.

The heaviest penalty for deciding to engage in politics is to be ruled by someone inferior to yourself.

The only real ill-doing is the deprivation of knowledge.

There is no other start to philosophy but wonder.

Every heart sings a song, incomplete, until another heart whispers back. Those who wish to sing always find a song. At the touch of a lover, everyone becomes a poet.

Human behavior flows from three main sources: desire, emotion, and knowledge.