Psalms 103:15 - Exposition

As for man, his days are as grass. Here is a new departure. From the loving kindness and mercy of God the psalmist passes to the weakness and helplessness of man. Man is like grass ( Psalms 37:2 ; Psalms 90:5 , Psalms 90:6 ; Psalms 102:11 ; Isaiah 40:6-8 , etc.). His days fleet and fade. He never "continueth in one stay." As a flower of the field (comp. Job 14:2 ; Isaiah 28:1 ; Isaiah 40:6 ; James 1:10 ; 1 Peter 1:24 , etc.). He flourisheth; i.e. he cometh up in full vigour, glorious to look upon, rejoicing in his youth and strength, but within a little time he fadeth, falleth away, or is "cut down, dried up, and withered." There is no strength or stability in him.