When we pray back to God His own promises given us in the Bible, Spurgeon said, we are “holding God to his word.”

He further says, “My brother, if you have a divine promise, you need not plead it with an ‘if’ in it; you may plead with a certainty. If for the mercy which you are now asking, you have God’s solemnly pledged word, there will scarce be any room for the caution about submission to his will. You know his will: that will is the promise; plead it. Do not give him rest until he fulfil it. He meant to fulfil it, or else he would not have given it … when he speaks, he speaks because he means to act.” –C.H. Spurgeon (Order and Argument in Prayer, July 15, 1886)