Augustine of Hippo · On Rebuke and Grace
Chapter 42 — The Reprobate are to Be Punished for Merits of a Different
But those who do not belong to this number of the predestinated, whom--whether that they have not yet any free choice of their will, or with a choice of will truly free, because freed by grace itself--the grace of God brings to His kingdom,--those, then, who do not belong to that most certain and blessed number, are most righteously judged according to their deservings. For either they lie under the sin which they have inherited by original generation, and depart hence with that inherited debt which is not put away by regeneration, or by their free will have added other sins besides; their will, I say, free, but not freed,--free from righteousness, but enslaved to sin, by which they are tossed about by divers mischievous lusts, some more evil, some less, but all evil; and they must be adjudged to diverse punishments, according to that very diversity. Or they receive the grace of God, but they are only for a season, and do not persevere; they forsake and are forsaken. For by their free will, as they have not received the gift of perseverance, they are sent away by the righteous and hidden judgment of God.
Chapter 43 [XIV.]--Rebuke and Grace Do Not Set Aside One Another.
Let men then suffer themselves to be rebuked when they sin, and not conclude against grace from the rebuke itself, nor from grace against rebuke; because both the righteous penalty of sin is due, and righteous rebuke belongs to it, if it is medicinally applied, even although the salvation of the ailing man is uncertain; so that if he who is rebuked belongs to the number of the predestinated, rebuke may be to him a wholesome medicine; and if he does not belong to that number, rebuke may be to him a penal infliction. Under that very uncertainty, therefore, it must of love be applied, although its result is unknown; and prayer must be made on his behalf to whom it is applied, that he may be healed. But when men either come or return into the way of righteousness by means of rebuke, who is it that worketh salvation in their hearts but that God who giveth the increase, whoever plants and waters, and whoever labours on the fields or shrubs,--that God whom no man's will resists when He wills to give salvation? For so to will or not to will is in the power of Him who willeth or willeth not, as not to hinder the divine will nor overcome the divine power. For even concerning those who do what He wills not, He Himself does what He will.