Be careful when you fight the monsters, lest you become one.

He divines remedies against injuries; he knows how to turn serious accidents to his own advantage; whatever does not kill him makes him stronger

"Ego," sayest thou, and art proud of that word. But the greater thing - in which thou art unwilling to believe - is thy body with its big sagacity; it saith not "ego," but doeth it.

We criticize a thinker more acutely when he advances a proposition that is disagreeable to us; and yet it would be more reasonableto do so when his proposition is agreeable to us.

There is more wisdom in your body than in your deepest philosophy.

There is more wisdom in your body than in your best wisdom. And who then knows why your body needs precisely your best wisdom?

We feign pity when we want to demonstrate our ascendancy over feelings of hostility: but usually in vain. Whenever we notice this,there is an accompanying surge in those hostile sensations.