David does not merely long for certain spiritual excellences; he goes to God for them. And his reasons for doing so are plain. If you will look at the former verses of this psalm, you will see that he had found out two things about his sin, both of which make him sure that he can only be what he should be by God's help He had learned what his crimes were in relation to God, and he had further learned what they indicated about himself. The teaching of his bitter experience as to the former of these two matters lies in that saying which some people have thought strange. Against Thee only have I sinned.' What! Had he not committed a crime against human law? had he not harmed Uriah and Bathsheba? were not his deeds an offence to his whole kingdom? Yes, he knew all that; but he felt that over and above all that was black in his deed, considered in its bearing upon men, it was still blacker when it was referred to God; and a sadder word than crime' or fault' had to be used about it. I have done wrong as against my fellows, but worse than that, I have sinned against God. The notion of sin implies the notion of God. Sin is wilful transgression of the law of God. An atheist can have no conception of sin. But bring God into human affairs, and men's faults immediately assume the darker tint, and become men's sins. Therefore the need of prayer if these evils are to be blotted out. If I had done crime against man only, I should not need to ask God for pardon or cleansing; but I have sinned against Him, and done this evil in His sight, therefore my desires for deliverance address themselves to Him, and my longings for purity must needs break into the cry of entreaty to that God with whom are forgiveness and redemption from all iniquity.
And still further, looking at the one deed, he sees in it something more than an isolated act. It leads him down to its motive; that motive carries him to the state of mind in which it could have power; that state of mind, in which the motive could have power, carries him still deeper to the bias of his nature as he had received it from his parents. And thinking of how he had fallen, how upon his terraced palace roof there the eye had inflamed the heart, and the heart had yielded so quickly to the temptations of the eye, he finds no profounder explanation of the disastrous eclipse of goodness than this: Behold! I was shapen in iniquity.'
Is that a confession or a palliation, do you think? Is he trying to shuffle off guilt from his own shoulders? By no means, for these words are the motive for the prayer, Purge me, and I shall be clean.' That is to say, he has learned that isolated acts of sin inhere in a common root, and that root a disposition inherited from generation to generation to which evil is familiar and easy, to which good, alas I is but too alien and unwelcome. None the less is the evil done his deed. None the less has he to wail in full consciousness Of his individual responsibility: Against Thee have I sinned.' But the effect of this second discovery, that sin has become so intertwisted with his being that he cannot shake off the venomous beast into the fire and feel no harm, is the same as that of the former--to drive him to God, who alone can heal the nature and: separate the poison from his blood.
Dear friends! there are some of you who are wasting your lives in paroxysms of fierce struggle with the evil that you have partially discovered in yourselves, alternating with long languor, fits of collapse and apathy, and who make no solid advance, just because you will not lay to heart these two convictions--your sin has to do with God, and your sins come from a sinful nature. Because of the one fact, you must go to God for pardon; because of the other, you must go to God for cleansing. There, in your heart, like some black well-head in a dismal bog, is the source of all the swampy corruption that fills your life. You cannot stanch it, you cannot drain it, you cannot sweeten it. Ask Him, who is above your nature and without it, to change it by His own new life infused into your spirit. He will heal the bitter waters. He alone can. Sin is against God; sin comes from an evil heart; therefore, if your longings for that ideal perfectness are ever to be fulfilled, you must make prayers of them, and cry to Him who hears, Create in me a clean heart, O God! take not Thy Holy Spirit from me.'
