For should the enemy strengthen his van, he will weaken his rear; should he strengthen his rear, he will weaken his van; should he strengthen his left, he will weaken his right; should he strengthen his right, he will weaken his left. If he sends reinforcements everywhere, he will everywhere be weak.

United you will be more than a match for your enemies. But if you quarrel and separate, your weakness will put you at the mercy of those who attack you.

Without enemies around us, we grow lazy. An enemy at our heels sharpens our wits, keeping us focused and alert. It is sometimes better, then, to use enemies as enemies rather than transforming them into friends or allies.

Do I not destroy my enemies when I make them my friends?

do I not destroy my enemies when I make them my friends?

Am I not destroying my enemies when I make friends of them?

Am I not destroying my enemies when I make friends of them?

Always remember...the stronger your position in life, the more enemies you're gonna have .. while friends come and go.

I have destroyed my enemies when I make friends with them

One enemy can do more hurt than ten friends can do good.

Have I not destroyed my enemy when I have made him into my friend?

Each of us is the enemy [...] to the other and to himself. That's what I mean: I'm the enemy within myself. Unless I master that enemy, I always lose.

Today's enemies can be your friends tomorrow. And today's friends can be tomorrow's enemies.

Everyone that you fight is not your enemy and everyone who helps you is not your friend.