Of Prayer, by John Calvin, tr. Henry Beveridge , at sacred-texts.com
In fine, supplication for pardon, with humble and ingenuous confession of guilt, forms both the preparation and commencement of right prayer. For the holiest of men cannot hope to obtain anything from God until he has been freely reconciled to him. God cannot be propitious to any but those whom he pardons. Hence it is not strange that this is the key by which believers open the door of prayer, as we learn from several passages in The Psalms. David, when presenting a request on a different subject, says, "Remember not the sins of my youth, nor my transgressions; according to thy mercy remember me, for thy goodness sake, O Lord" (Psalm 25:7). Again, "Look upon my affliction and my pain, and forgive my sins" (Psalm 25:18). Here also we see that it is not sufficient to call ourselves to account for the sins of each passing day; we must also call to mind those which might seem to have been long before buried in oblivion. For in another passage the same prophet, confessing one grievous crime, takes occasion to go back to his very birth, "I was shapen in iniquity, and in sin did my mother conceive me" (Psalm 51:5); not to extenuate the fault by the corruption of his nature, but as it were to accumulate the sins of his whole life, that the stricter he was in condemning himself, the more placable God might be. But although the saints do not always in express terms ask forgiveness of sins, yet if we carefully ponder those prayers as given in Scripture, the truth of what I say will readily appear; namely, that their courage to pray was derived solely from the mercy of God, and that they always began with appeasing him. For when a man interrogates his conscience, so far is he from presuming to lay his cares familiarly before God, that if he did not trust to mercy and pardon, he would tremble at the very thought of approaching him. There is, indeed, another special confession. When believers long for deliverance from punishment, they at the same time pray that their sins may be pardoned; 3 for it were absurd to wish that the effect should be taken away while the cause remains. For we must beware of imitating foolish patients who, anxious only about curing accidental symptoms, neglect the root of the disease. 4 Nay, our endeavour must be to have God propitious even before he attests his favour by external signs, both because this is the order which he himself chooses, and it were of little avail to experience his kindness, did not conscience feel that he is appeased, and thus enable us to regard him as altogether lovely. Of this we are even reminded by our Saviour's reply. Having determined to cure the paralytic, he says, "Thy sins are forgiven thee;" in other words, he raises our thoughts to the object which is especially to be desired, viz. admission into the favour of God, and then gives the fruit of reconciliation by bringing assistance to us. But besides that special confession of present guilt which believers employ, in supplicating for pardon of every fault and punishment, that general introduction which procures favour for our prayers must never be omitted, because prayers will never reach God unless they are founded on free mercy. To this we may refer the words of John, "If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness" (1 John 1:9). Hence, under the law it was necessary to consecrate prayers by the expiation of blood, both that they might be accepted, and that the people might be warned that they were unworthy of the high privilege until, being purged from their defilements, they founded their confidence in prayer entirely on the mercy of God.
3 French, "il reconoissent le chastisement qu’ils ont merité;"—they acknowledge the punishment which they have deserved.
4 The French adds, "Ils voudront qu’on leur oste le mal de tests et des reins, et seront contens qu’on ne touche point a la fievre;"—They would wish to get quit of the pain in the head and the loins, and would be contented to leave the fever untouched.