A hallmark of the wise man is caution and prudence in his relationships with others. A good relationship brings benefits, but a bad one can harm a man who is not careful; therefore, getting into a fight with a powerful or wealthy person could be fatal. Stopping to talk to a foul-mouthed person is a waste of time, as is despising an elderly or dying person, which, although it does not cause material harm, does cause moral damage to the image or reputation of the wise man.