Adam Clarke on Psalms 141:1

Lord, I cry unto thee - Many of David's Psalms begin with complaints; but they are not those of habitual plaint and peevishness. He was in frequent troubles and difficulties, and he always sought help in God. He ever appears in earnest; at no time is there any evidence that the devotion of David was formal. He prayed, meditated, supplicated, groaned, cried, and even roared, as he tells us, for the disquietude of his soul. He had speedy answers; for he had much faith, and was always in earnest.