"The two enemies of human happiness are pain and boredom " — Arthur Schopenhauer

So long as governments set the example of killing their enemies, private citizens will occasionally kill theirs.

We make our friends; we make our enemies; but God makes our next-door neighbour

Always forgive your enemies - nothing annoys them so much.

You must not fight too often with one enemy, or you will teach him all your tricks of war

I destroy my enemies when I make them my friends

After victory you have more enemies.

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