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

All truly great thoughts are conceived by walking.

Only you must have worthy foes hate, but not enemies worthy of contempt. You must be proud of your enemy.

That a person cannot and consequently will not defend himself, does not yet cast disgrace upon him in our eyes ; but we despise the person who has neither the ability nor the good will for revenge whether it be a man or a woman.

What does not destroy me, makes me stronger.

The heart and hand of those who always mete out become callous from always meting out.

Without passions you have no experience whatever.