Charles H. Spurgeon on Psalms 130:2

Lord, hear my voice, etc. Every prayer should have its reverent invocation, as every temple its porch. The two greatest prayers in the Old Testament —Solomon's prayer and Daniel's prayer —both have it very emphatically. And it is a very distinct part of our own perfect model: "Our Father, which art in heaven, hallowed be thy name." On our part it is deferential, and puts the mind into its proper form; while it places the great God, whom it addresses, where he ought to be, —in the awe of his glory; in the magnitude of his power; in the infinitude of his wisdom and love. Never think little of that part of your prayer: never omit, never hurry over the opening address. Do not go into his presence without a pause, or some devout ascription. Lord, hear my voice: let thine ears be attentive to the voice of my supplications. True, he is always listening and waiting for his children's "cry", —far more prepared to answer, than we are to ask. And the very fact that we are praying is a proof of his attention, —for who but he put it into our hearts to make that prayer? Nevertheless, it becomes us, and honours him, to establish, at the outset, the right relationship between a creature and his Creator; between a child and his Father: "Lord, hear my voice: let thine ears be attentive to the voice of my supplication." —James Vaughan.