Imputation

Sin, however, though it ceases to reign, ceases not to dwell in them. … We admit that these remains, just as if they had no existence, are not imputed, but we, at the same time, contend that it is owing to the mercy of God that the saints are not charged with the guilt which would otherwise make them sinners before God.

Now although by regeneration we hold that the guilt and pollution of original sin is taken away as to dominion (because it is neither imputed to them anymore for condemnation, nor does it reign in them), yet we deny that it is absolutely taken away as to existence and whatever holds the relation of sin in it.

That concupiscence does not condemn the regenerate, comes to pass by an accident, which is the grace of God, which does not impute it to the faithful. This, however, does not occur in this way, as though concupiscence were no sin; for other sins in like manner do not condemn the regenerate, not because they are no sins, but because they have obtained the pardon of them through Christ.

Indeed it remains till death, and it is sin considered in itself, so long as it remains, but it is not imputed unto the person: and in that respect is as though it were not; it being pardoned.

When they demand, How can we be justified by the righteousness of another? Can I be rich with another man's money, or preferred by another man's honours? Our answer is, yes, if that other be my surety or husband. Indeed Peter can not be justified by the righteousness of Paul; but both may be justified by the righteousness of Christ imputed to them; they being members, jointly knit to one common Head. Principal and surety are one in obligations and constructions of law. Head and members are one body, branch and stock are one tree; and it is no strange thing to see a graff live by the sap of another stock, when once it is ingrafted into it.