1. It must be of infinite value, otherwise it would not be sufficient to compensate for the injuries offered to the divine name by sin, which is objectively infinite, and therefore deserves a punishment proportioned to it, and consequently the price demanded to satisfy for it, must be of equal value. The justice of God would cast the utmost contempt on any thing that falls short hereof: thus the prophet represents one, as making a very large overture, which one would think sufficient, if a finite price were so, when he speaks, in a beautiful climax, or gradation, of coming before the Lord _with burnt-offerings_, and these well chosen, _calves of a year old_, and a multitude of them; _Will the Lord be pleased with thousands of rams_, a price which very few were able to give, _or with ten thousands of rivers of oil_? in which he offers more than it was possible to give; then he ascends yet higher, and, if it were sufficient, would part with _his first-born for his transgression, the fruit of his body, for the sin of his soul_; all which is reckoned an inconsiderable price, not sufficient to procure the thing designed thereby; and therefore he that offers it, is advised instead of pretending to satisfy divine justice by a finite price, _to walk humbly with his God_, Micah vi. 7, 8. and, whatever obedience he is obliged to perform, not to have the vanity to think that this is a sufficient price to answer that end. 2. Satisfaction must bear some similitude, or resemblance, as to the matter of it, to that debt which was due from those for whom it was to be given. Here we must consider what was the debt due from us, for which a demand of satisfaction was made; this was twofold. _1st_, A debt of perfect and sinless obedience, whereby the glory of God’s sovereignty might be secured, and the honour of his law maintained. This debt it was morally impossible for man to pay, after his fall; for it implies a contradiction to say that a fallen creature can yield sinless obedience; nevertheless, it was demanded of us, though fallen; for the obligation could not be disannulled by our disability to perform it. _2dly_, There was a debt of punishment, which we were liable to, in proportion to the demerit of sin, as the result of the condemning sentence of the law, which threatened death for every transgression and disobedience. Now, to be satisfaction to the justice of God, it must have these ingredients in it.