Charles H. Spurgeon on Psalms 13:6

"I will sing unto the Lord, because he hath dealt bountifully with me." Faith keeps the soul from sinking under heavy trials, by bringing in former experiences of the power, mercy, and faithfulness of God to the afflicted soul. Hereby was the psalmist supported in distress. Oh, saith faith, remember what God hath done both for thy outward and inward man: he hath not only delivered thy body when in trouble, but he hath done great things for thy soul; he hath brought thee out of a state of black nature, entered into a covenant relation with thee, made his goodness pass before thee; he hath helped thee to pray, and many times hath heard thy prayers and thy tears. Hath he not formerly brought thee out of the horrible pit, and out of the miry clay, and put a new song in thy mouth, and made thee to resolve never to give way to such unbelieving thoughts and fears again? and how unbecoming is it for thee now to sink in trouble? John Willison, 1680-1750.