The following comments are from The Preacher’s Complete Homiletical Commentary, Psalm 18: 23. It is being posted because in his comments about besetting sins, he says some things that I believe to be of great benefit to anyone struggling with their sins, seeking to be obedient. …In the subduing of our besetting sin lies the great struggle of life. Our love to God, our allegiance to Him, is tested, not by ten commandments, but rather by one or two of them. The question of our moral character is fought out on some one question. …We must estimate our character according to our relation to the besetting sin. We sometimes flatteringly estimate our character by reckoning up the sins to which we have no inclination. This is a fatal miscalculation. Is it not a maxim in mechanics, that a thing is no stronger than its weakest part? This is as true in morals as in mechanics.