Be sure, either that thou art stronger than thine enemy, or that thou hast a swifter pair of heels.
Whoever has his foe at his mercy, and does not kill him, is his own enemy
When thou seest thine enemy in trouble, curl not thy whiskers in contempt; for in every bone there is marrow, and within every jacket there is a man.
It is better to break off a thousand friendships, than to endure the sight of a single enemy.
Reveal not every secret you have to a friend, for how can you tell but that friend may hereafter become and enemy. And bring not all mischief you are able to upon an enemy, for he may one day become your friend.
Inflict not on an enemy every injury in your power, for he may afterwards become your friend.
When you see contention amongst your enemies, go and sit at ease with your friends; but when you see them of one mind, string your bow, and place stones upon the ramparts.