He will never have true friends who is afraid of making enemies.

He whose friendship is worth having, must hate and be hated.

Il est plus honteux de se défier de ses amis que d'en être trompé.

The meanest man in the world,” he remarked, “is the man who forgets the old friends that helped him on an early day and over early difficulties.

An injured friend is the bitterest of foes.

For somehow this is tyranny's disease, to trust no friends.

He detested them for forcing helplessness upon him.

In Aberdeen, I hated my best friends with a passion, because they were idiots.

A man friends are more capable of working him harm than strangers; and his greatest
danger lies in his own habits.

Count me not your friend but the enemy of your enemies.

there is, after all, no harsher bitterness than that of a person who is his own worst enemy.

Friends are nothing but a known enemy

This is a sickness rooted and inherent in the nature of a tyranny: that he that holds it does not trust his friends.

An intellectual hatred is the worst.