Rivalry adds so much to the charms of one’s conquests.

Revenge may be wicked, but it’s natural.

The only competition worthy a wise man is with himself.

He laughs best who laughs last.

The hatred of relatives is the bitterest.

It is permitted to learn even from an enemy.

With the dead there is no rivalry.

How can we bear misfortune most easily? If we see our enemies faring worse.

The envious die not once, but as often as the envied win applause.

Hate must make a man productive. Otherwise one might as well love.

An injury is much sooner forgotten than an insult.

Many need no other provocation to enmity than that they find themselves excelled.

To outwit an enemy is not only just and glorious but profitable and sweet.