One ought to hold on to one's heart; for if one lets it go, one soon loses control of the head too.

Be careful who you choose as your enemy because that's who you become most like.

What is evil?-Whatever springs from weakness.

What is it that endowed things with meaning, value, significance? The creating heart, which desired, and, out of its desire, created. It created joy and woe. It wanted to satiate itself with woe. We must take all the suffering that has been endured by men and animals upon ourselves and affirm it, and possess a goal in which it acquires reason.

[Heraclitus had] a regal air of certainty.

I am one thing, my writings are another.

Once we have found ourselves, we must understand how from time to time to lose--and then to find--ourselves once again: assuming,that is, that we are thinkers. For a thinker it is a drawback to be bound to a single person all the time.