2 Samuel 7:25-29: in context

God has just made David an astonishing promise, that he will establish David's house and throne forever. David responds with a prayer, and its shape is worth noticing: he takes God's promise and prays it back to him. Now, LORD God, he prays, the word you have spoken concerning your servant and his house, confirm it forever, and do as you have spoken. You are God, and your words are truth, and you have promised this good thing to your servant. Let it please you to bless the house of your servant, that it may continue forever, for you, Lord GOD, have spoken it.

The pattern of David's prayer is instructive: he prays God's own promise back to him. God had said, I will establish your house; and David prays, do as you have spoken; confirm your word forever. He does not ask for something God has not promised, or plead his own worthiness; he takes hold of what God has said and asks God to fulfill it, grounding his prayer entirely on God's word. You have promised this good thing, he says, and your words are truth; therefore do as you have spoken. There is a confidence in that kind of praying, and a right one. When we pray on the ground of God's own promises, asking him to do what he has said he will do, we pray with a boldness that does not depend on our worthiness but on his faithfulness. David's confidence was not in himself but in the truth of God's word: you have spoken it, therefore let it be so. This is a pattern worth learning for our own prayers. God has made many promises in his word, and we may take hold of them and pray them back to him, asking him to do as he has said, resting our request not on our deserving but on his faithfulness to his own word. To pray God's promises back to him, do as you have spoken, is to pray with confidence, for we are not asking him for a favor we have earned but for the fulfillment of what he himself has promised. Your words are truth, David prayed, and you have promised this good thing; do as you have spoken. That is prayer grounded on sure ground, the faithfulness of God to his own word.

Do I pray, as David did, on the ground of God's own promises, taking hold of what he has said and asking him to do as he has spoken, resting my confidence not on my own worthiness but on his faithfulness to his word, which is truth?