"The Importance of Repentance" by B.B. Warfield

By repentance we are to mean, not merely sorrow for and hatred of sin, but also the inward turning away from it to God, with full purpose of new obedience. By original sin we are to mean not merely adherent but also inherent sin, not merely the sinful act of Adam imputed to us, but also the sinful state of our own souls conveyed to us by the just judgment of God. When so understood, it would seem sufficiently clear that we must ‘repent of original sin.’ The corruption that is derived by us from our first parents comes to us, indeed, as penalty; but it abides in us as sin, and must be looked upon as sin both by God and by enlightened conscience itself...And thus it appears, that so far from its being impossible to repent of original sin, repentance, considered in its normative sense—not as an act of turning away from this sin or that sin, but of turning from sin as such to God—is fundamentally just repentance of ‘original sin.’ Until we repent of original sin, we have not, properly speaking, repented in the Christian sense at all. For it is characteristic of heathen thought to look upon sin atomistically as only so many acts of sin, and at repentance also, therefore, atomistically as only so many acts of turning away from sinning; the Christian conception probes deeper and finds behind the acts of sin the sinful nature and behind the specific acts of repentance for sins the great normative act of repentance for this sinful nature. He only, then, has really repented who has perceived and felt the filthiness and odiousness of his depraved nature and has turned from it to God with a full purpose of being hereafter more conformed to his image as revealed in the face of Jesus Christ (B.B. Warfield, Selected Shorter Writings - 1