Charles H. Spurgeon on Psalms 142:2

Poured out...before him. Those words teach us that in prayer we should not try to keep anything back from God, but should show him all that is in our hearts, and that in his presence in our closet, with the door shut, but not before men. The Carmelite adds that there is much force in the words with my voice, twice repeated (as in Heb., A.V. Vulgate, etc.) to show us that we ought to pray to God directly for ourselves, and in person, and not be contented with an Ora pro me addressed to some one else. —Cassiodorus and Ayguan, in Neale and Littledale.