Fret not thyself because of evil men,.... Because of their outward prosperity and worldly happiness, any more than rejoice at their adversity; neither do the one nor the other; where the one prevails, the other does also; by the frequent repetition of this advice, it looks as if this evil is what good men are prone to, and which was very common in Solomon's time, and in the time of his father David, from whom he seems to have borrowed these words, Psa 37:1; see Pro 23:17; neither be thou envious at the wicked; though they may stand when thou fallest, or be in prosperity when thou art in adversity; the reasons follow.