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Nothing is as dangerous as an ignorant friend; a wise enemy is to be preferred.

I'm my own worst enemy and I know that.

One never really knows who one's enemy is.

We must, all of us, learn actually not to have enemies, but only confused adversaries who are ourselves in disguise.

If you have an enemy, then learn and know your enemy, don't just be mad at him or her.

No one is to be called an enemy, all are your benefactors, and no one does you harm. You have no enemy except yourselves.

There are a lot of people out there who think that I am their worst enemy, and I don't even care if these people exist.

I am not anyone's enemy.

Never hate your enemies. It affects your judgment.