Do not unto another that you would hot have him do unto you. Thou needest this law alone. It is the foundation of all the rest.
Know what you know and know that you don't know what you don't know — that is the characteristic of one who knows.
Gravity is only the bark of wisdom's tree, but it preserves it.
An angry man is full of poison.
Be aroused by poetry; structure yourself with propriety, refine yourself with music.
Don't worry if people don't recognize your merits; worry that you may not recognize theirs.