Psalms 18:1
1I love you, LORD, my strength.
Wesley: Love—Most affectionately, and with my whole soul; as the Hebrew word signifies. David opens the song of deliverance with whole-souled love to the LORD his strength.
Love God with the whole heart as the first response to saving strength. Grace kindles affection; the hearer must still love the LORD who has been his strength, not treat deliverance as a trophy without devotion.
Calvin: love to God is the principal part of true godliness; there is no better way of serving God than to love him. He requires to possess all the affections of the heart. There is no sacrifice he values more than when we are bound to him by free and spontaneous love. David makes as it were a solemn vow: Lord, as thou art my strength, I will continue united and devoted to thee by unfeigned love.
Affectionate love answered to free goodness. Deliverance must not breed ingratitude; the heart stays bound to the Strength who saved.