Charles H. Spurgeon on Psalms 116:2

Because he hath inclined his ear unto me: —bowing down from his grandeur to attend to my prayer; the figure seems to be that of a tender physician or loving friend leaning over a sick man whose voice is faint and scarcely audible, so as to catch every accent and whisper. When our prayer is very feeble, so that we ourselves can scarcely hear it, and question whether we do pray or not, yet God bows a listening ear, and regards our supplications. Therefore will I call upon him as long as I live, or "in my days." Throughout all the days of my life I will address my prayer to God alone, and to him I will unceasingly pray. It is always wise to go where we are welcome and are well treated. The word "call" may imply praise as well as prayer: calling upon the name of the Lord is an expressive name for adoration of all kinds. When prayer is heard in our feebleness, and answered in the strength and greatness of God, we are strengthened in the habit of prayer, and confirmed in the resolve to make ceaseless intercession. We should not thank a beggar who informed us that because we had granted his request he would never cease to beg of us, and yet doubtless it is acceptable to God that his petitioners should form the resolution to continue in prayer: this shows the greatness of his goodness, and the abundance of his patience. In all days let us pray and praise the Ancient of days. He promises that as our days our strength shall be; let us resolve that as our days our devotion shall be.