Plutarch has written an essay on the benefits which a man may receive from his enemies; and among the good fruits of enmity, mentions this in particular, that by the reproaches which it casts upon us, we see the worst side of ourselves
I choose my friends for their good looks, my acquaintances for their good characters, and my enemies for their intellects. A man cannot be too careful in the choice of his enemies
On Destiny: "Our destiny exercises its influence over us even when, as yet, we have not learned its nature: it is our future that lays down the law of our today."
Human, All Too Human