Charles H. Spurgeon on Psalms 18:23

"Mine iniquity." The actual reign of sin is commonly of some particular master-lust, which is as the viceroy over all the rest of the sins in the soul, and commands them all as lord paramount, and makes them all subservient and subordinate unto it; and this is according to custom, calling, constitution, abilities, relations, and according to the different administrations of the Spirit of God; for though God be not the author of sin, yet he is the orderer of sin. So that it is that way of sin and death that a man chooseth to himself, he having looked abroad upon all the contentments of the world, his own corrupt inclination doth choose unto himself to follow with greatest sweetness and contentment and delight, as that wherein the happiness of his life consists; that as in the body there is in every one some predominant humour, so there is in the body of sin also; that as the natural man, though there be all the faculties, yet some faculties are in some more lively and vigorous than in others, some are more witty, some are more strong, some quick of sight, some have a ready ear, and others a nimble tongue, etc. So it is in the old man also; there is all the power of sin in an unregenerate man, but in some more dexterous one way than another; as men in the choice of calling, some have a greater inclination to one thing than to another, so it is in the choice of contentments also: as in the appetite for food, so it is in lust, being nothing else but the appetite of the creature corrupted to some sinful object. —William Strong.