"I love the LORD, because he hath heard my voice and my supplications. Because he hath inclined his ear unto me, therefore will I call upon him as long as I live."
God hearing and answering David's prayer is by no means the main reason he loved the Lord, but most certainly is at the top of the list among the many other reasons. Someone might say, "But the text doesn't say God answered his prayer, only that He heard it." By checking the context (v.8), we see He did answer him. But had we no mention of an answer, common sense tells us He did. Otherwise,how would he have known God heard him? The prophets prayed all day for Baal to hear and answer them, but there was no answer. Elijah prayed a short prayer and God heard, and proved that He did by answering him.
John tells us, "We love Him because He first loved us." And how did He love us? "God so loved...He gave!" And why do we love Him? Because He gave. The principle is the same in David's case and throughout the Bible. When the Lover of our souls gives to His beloved simply because she asks, her love deepens. There is a glowing and growing love in the soul of a child when he or she realizes their father both heard and answered their request.
Jesus said, concerning prayer, "Whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son." Is it not proper then to ask a granting of our prayers that God may be glorified? And, as David, is it not also fitting to ask God to give us our petitions that we may love Him even more? What David said in our text would not sound too spiritual to the "spiritual elite" of our day, but God knew David's heart. And He knows yours and mine dear friend.