If measure and symmetry are absent from any composition in any degree, ruin awaits both the ingredients and the composition... Measure and symmetry are beauty and virtue the world over.

I know nothing but the certainty of my own ignorance.

Are you not ashamed of your eagerness to possess as much wealth, reputation, and honors as possible, while you do not care for nor give thought to wisdom or truth, or the best possible state of your soul?

It is better to be at odds with the whole world than, being one, to be at odds with myself.

No one can teach, if by teaching we mean the transmission of knowledge, in any mechanical fashion, from one person to another. The most that can be done is that one person who is more knowledgeable than another can, by asking a series of questions, stimulate the other to think, and so cause him to learn for himself.

Wisdom is knowing when you don't know

My friend...care for your psyche...know thyself, for once we know ourselves, we may learn how to care for ourselves