Enemies promises were made to be broken.
It is not necessary to have enemies if you go out of your way to make friends hate you.
The enemy is more easily overcome if he be not suffered to enter the door of our hearts, but be resisted without the gate at his first knock.
Man has no greater enemy than himself.
One reason we should love our enemies is that we made them ourselves. Another reason is that they keep us on our toes, a third reason is that we should make them our friends.
Observe your enemies, for they first find out your faults.
Love your enemies just in case your friends turn out to be a bunch of bastards.
It is hard to fight an enemy who has outposts in your head.
Talk well of your friends and of your enemies say nothing.
A person is his own worst enemy.
Serve your enemies for they first find out your faults
There is nothing like the sight of an old enemy down on his luck.