“God as a truthful, righteous judge cannot look upon a sinner as anything but a sinner. He cannot pretend that the sinner is not guilty. Nor can he accept a sinner into his fellowship. Nor can he forego punishment. Nor can the punishment be less than what is demanded by the offense. Thus to save sinners, God offered his Son as their substitute, imputing their sins to him and making expiation by his death. Christ did not pay fifty cents on the dollar but, suffering in our place, made full payment for our sins. God forgives, therefore, not out of hand but on the ground of justice, in keeping with a law whose demand has been fully satisfied by Christ the substitute, who out of infinite love provided himself as the substitute.”
Zaspel, Fred G. (2010-09-02). The Theology of B. B. Warfield: A Systematic Summary (p. 297). Good News Publishers/Crossway Books. Kindle Edition.