Charles H. Spurgeon on Psalms 38:4

For mine iniquities are gone over mine head: as an heavy burden they are too heavy for me. David proceeds to a reason why his prayer must be vehement, why these miseries of his are so violent, and why God's anger is permanent, and he finds this all to be, because in his sins, all these venomous qualities, vehemence, violence, and continuance, were complicated, and unwrapped; for he had sinned vehemently, in the rage of lust, and violently, in the effusion of blood, and permanently, in a long and senseless security. They are all contracted in this text into two kinds, which will be our two parts in handling these words: first, the Supergressae super, "Mine iniquities are gone over my head, "there is the multiplicity, the number, the succession, and so the continuation of his sin; and then, the Gravatae super, "My sins are as a heavy burden, too heavy for me, "there is the greatness, the weight, the insupportableness of his sin. St. Augustine calls these two distinctions or considerations of sin, ignorantiam, et difficultatem; first that David was ignorant, that he saw not the tide, as it swelled up upon him, abyssus abyssum, depth called upon depth; and all thy waters, and all thy billows are gone over me (says he in another place); he perceived them not coming till they were over him, he discerned not his particular sins then when he committed them, till they came to the supergressae super, to that height that he was overflowed, surrounded, his iniquities were gone over his head; and in that St. Augustine notes ignorantiam, his inobservance, his inconsiderations of his own case; and then he notes difficultatem, the hardness of recovering, because he that is under water hath no air to see by, no air to hear by, he hath nothing to reach to, he touches not ground, to push him up, he feels no bough to pull him up, and therein that further notes difficultatem, the hardness of recovering. Now Moses expresses these two miseries together, in the destruction of the Egyptians, in his song, after Israel's deliverance, and the Egyptians' submersion, "The depths have covered them" (there is the supergressae super, their iniquities, in that punishment of their iniquities, were gone over their heads), and then they sank into the bottom like a stone (says Moses), there is the gravatae super, they depressed them, suppressed them, oppressed them, they were under them, and there they must lie. The Egyptians had, David had, we have, too many sins to swim above water, and too great sins to get above water again when we are sunk. John Donne.