This is an acrostic psalm, grappling with the problem of the inequality of human life and the apparent failure of God to reward His servants and punish His enemies as they deserve. Life and immortality, where we know that the balance will be readjusted, had not then been brought to light, and therefore the solution was far harder before the advent of our Lord than for us.
But though the psalmist's solution is therefore not complete, his teaching of the blessedness of absolute trust in God's providence is very delightful. Fret not thyself; that is, do not give way to passionate resentment or bitter disappointment. Live in God; find your delight in contemplating His nature and His works; roll on Him the decision of your life-choices; trust in Him to supply all your need and work in your behalf. Be silent and rest!
How dramatically this picture of the happy, restful child of God is contrasted with the wicked and his certain doom-like barren pastures scorched by heat, or thin smoke-columns vanishing in the air! "Wait and trust! [source]
Chapter Summary: Psalms 37
1David persuades to patience and confidence in God, 12by the different estate of the godly and the wicked
What do the individual words in Psalms 37:15 mean?
Their swordshall entertheir own heartand their bowsshall be broken