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. Footnote 28: ומצדיק. Footnote 29: _The former of these divines call_ reatus potentialis, _the latter_, reatus actualis; _the former is the immediate consequence of sin, the latter is taken away by justification._ Footnote 30: