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.
The bird alighteth not on the spread net when it beholds another bird in the snare. Take warning by the misfortunes of others, that others may not take example from you.