Psa 37:1-6 Fret not yourself because of evildoers; be not envious of wrongdoers! For they will soon fade like the grass and wither like the green herb. Trust in the LORD, and do good; dwell in the land and befriend faithfulness. Delight yourself in the LORD, and he will give you the desires of your heart. Commit your way to the LORD; trust in him, and he will act. He will bring forth your righteousness as the light, and your justice as the noonday.
When we look abroad we see the world full of evil-doers, that flourish and live in ease. So it was seen of old, therefore let us not marvel at the matter. We are tempted to fret at this, to think them the only happy people, and so we are prone to do like them: but this we are warned against. Outward prosperity is fading. When we look forward, with an eye of faith, we shall see no reason to envy the wicked. Their weeping and wailing will be everlasting. The life of religion is a believing trust in the Lord, and diligent care to serve him according to his will. It is not trusting God, but tempting him, if we do not make conscience of our duty to him. A man’s life consists not in abundance, but, Thou shalt have food convenient for thee. This is more than we deserve, and it is enough for one that is going to heaven. To delight in God is as much a privilege as a duty. He has not promised to gratify the appetites of the body, and the humours of the fancy, but the desires of the renewed, sanctified soul. What is the desire of the heart of a good man? It is this, to know, and love, and serve God. Commit thy way unto the Lord; roll thy way upon the Lord, so the margin reads it. Cast thy burden upon the Lord, the burden of thy care. We must roll it off ourselves, not afflict and perplex ourselves with thoughts about future events, but refer them to God. By prayer spread thy case and all thy cares before the Lord, and trust in him. We must do our duty, and then leave the event with God. The promise is very sweet: He shall bring that to pass, whatever it is, which thou has committed to him. (Henry)
Fret not thyself – The Hebrew word here means properly to burn, to be kindled, to be inflamed, and is often applied to anger, as if under its influence we become “heated:” Genesis 31:36; Genesis 34:7; 1 Samuel 15:11; 2 Samuel 19:43. Hence, it means to fret oneself, to be angry, or indignant. Compare Proverbs 24:19. We should perhaps express the same idea by the word “worrying” or “chafing.” The state of mind is that where we are worried, or envious, because others are prosperous and successful, and we are not. The idea is, therefore, closely allied with that in the other part of the verse, “neither be thou “envious.””
Because of evil-doers – Wicked men:
(a) at the fact that there are wicked men, or that God suffers them to live;
(b) at their numbers;
(c) at their success and prosperity.
Neither be thou envious – Envy is pain, mortification, discontent, at the superior excellence or prosperity of others, accompanied often with some degree of malignant feeling, and with a disposition to detract from their merit. It is the result of a comparison of ourselves with others who are more highly gifted or favored, or who are more successful than we are ourselves. The feeling referred to here is that which springs up in the mind when we see persons of corrupt or wicked character prospered, while we, endeavoring to do right, are left to poverty, to disappointment, and to tears. (Barnes)
