God assures us that when we ask him for something, he will give it to us. By doubting him, we make him a liar and contradict our own prayer. By not believing him, we insult God truthfulness, the same truth we rely on him when we pray. This is why we say the little word Amen at the end of our prayers. We use it to express our firm, heartfelt faith. It's like saying, "O God, I have no doubt that you will give me what I ask for in prayer.
Martin Luther, "Faith Alone," January 26
