Psalms 51:7

"Purge me with hyssop, and I shall be clean: wash me, and I shall be whiter than snow." (David's horrible sin had stained him and left him needing to be washed. Searching through the whole of Scripture, or at least through the Old Testament, I do not know where we have the record of a worse sin committed by one who yet was a true child of God. He had good reason to pray to the Lord, "Wash me," for he had a special and peculiar stain. The power of Jesus Christ to cleanse from sin must lie, first, in the greatness of his person. It is inconceivable that the sufferings of a mere man, however holy or great he might have been, could have made atonement for the sins of all the Lord's chosen people. It was because Jesus Christ was one of the persons in the divine Trinity. It was because the Son of Mary was none other than the Son of God. It was because he who lived and labored and suffered and died was the great Creator, without whom nothing was made that was made, that his blood has such efficacy that it can wash the blackest sinners so clean that they are "whiter than snow.")

Charles H. Spurgeon