Fret not yourself because of evildoers, neither be you envious of the workers of iniquity.
All Commentaries on Psalms 37:1 Go To Psalms 37
Augustine of Hippo
AD 430
2. This it is that disturbs you who are a Christian; that you see men of bad lives prospering, and surrounded with abundance of things like these; you see them sound in health, distinguished with proud honours; you see their family unvisited by misfortune; the happiness of their relatives, the obsequious attendance of their dependants, their most commanding influence, theirs life uninterrupted by any sad event; you see their characters most profligate, their external resources most affluent; and your heart says that there is no Divine judgment; that all things are carried to and fro by accidents, and blown about in disorderly; and irregular motions. For if God, thou sayest, regarded human affairs, would his iniquity flourish, and my innocence suffer? Every sickness of the soul hath in Scripture its proper remedy. Let him then whose sickness is of that kind that he says in his heart things like these, let him drink this Psalm by way of potion. ...