3. It was a very great instance of grace in our Saviour, that he was pleased to consent to perform this work for us, without which the justice of God could not have exacted the debt of him; and he being perfectly innocent, could not be obliged to suffer punishment, which it would have been unjust in God to have inflicted, had he not been willing to be charged with our guilt, and to stand in our room and stead. And his grace herein more eminently appears, in that though he knew before-hand all the difficulties, sorrows, and temptations, which he was to meet with in the discharge of this work; yet this did not discourage him from undertaking it; neither was he unapprised of the character of those for whom he undertook it: he knew the rebellion, and guilt contracted thereby, that rendered this necessary, in order to their salvation; and he knew before-hand, that they would, notwithstanding all the engagements he might lay on them to the contrary, discover the greatest ingratitude towards him; and, instead of improving so great an instance of condescending goodness, that they would neglect this great salvation, when purchased by him, and thereby appear to be his greatest enemies, notwithstanding this act of friendship to them, unless he not only engaged to purchase redemption for, but apply it to them, and work those graces in them whereby they might be enabled to give him the glory which is due to him for this great undertaking. And this leads us,
VII. To consider the use of faith in justification, and how, notwithstanding what has been said concerning our being justified by Christ’s righteousness, we may, in other respects, be said to be justified by faith; and also shew what this faith is, whereby we are justified: which being particularly insisted on in the two following answers, we shall proceed to consider them.
Quest. LXXII., LXXIII.
Quest. LXXII. What is justifying Faith?
Answ. Justifying faith is a saving grace, wrought in the heart of a sinner, by the Spirit and word of God; whereby he, being convinced of his sin and misery, and of the disability in himself, and all other creatures, to recover him out of his lost condition, not only assenteth to the truth of the promise of the gospel, but receiveth and resteth upon Christ and his righteousness therein held forth, for pardon of sin, and for the accepting and accounting of his person, righteous in the sight of God for salvation.
Quest. LXXIII. How doth faith justify a sinner in the sight of God?
Answ. Faith justifies a sinner in the sight of God; not because of those graces which do always accompany it, or of those good works that are the fruits of it; nor as if the grace of faith, or any act thereof, were imputed to him for justification; but only as it is an instrument, by which he receiveth and applieth Christ and his righteousness.
We choose first to speak to the latter of these two answers, in which faith is considered as that whereby a sinner is justified, before the former of them, inasmuch as it seems better connected with what has been before insisted on, in explaining the doctrine of justification. And in considering the account we have of justifying faith, there are two things, which may be taken notice of, in this answer.
I. It is observed, that though there are other graces which always accompany faith and good works, that flow from it; yet none of these are said to justify a sinner in the sight of God.
II. How faith justifies, or what it is to be justified by faith.[[49]]