“it is perverse to measure divine by the standard of human justice”
“But if it is so, (you will say,) little faith can be put in the Gospel promises, which, in testifying concerning the will of God, declare that he wills what is contrary to his inviolable decree. Not at all; for however universal the promises of salvation may be, there is no discrepancy between them and the predestination of the reprobate, provided we attend to their effect. We know that the promises are effectual only when we receive them in faith, but, on the contrary, when faith is made void, the promise is of no effect. If this is the nature of the promises, let us now see whether there be any inconsistency between the two things, viz., that God, by an eternal decree, fixed the number of those whom he is pleased to embrace in love, and on whom he is pleased to display his wrath, and that he offers salvation indiscriminately to all. I hold that they are perfectly consistent, for all that is meant by the promise is, just that his mercy is offered to all who desire and implore it, and this none do, save those whom he has enlightened. Moreover, he enlightens those whom he has predestinated to salvation. Thus the truth of the promises remains firm and unshaken, so that it cannot be said there is any disagreement between the eternal election of God and the testimony of his grace which he offers to believers. But why does he mention all men? Namely that the consciences of the righteous may rest the more secure when they understand that there is no difference between sinners, provided they have faith, and that the ungodly may not be able to allege that they have not an asylum to which they may retake themselves from the bondage of sin, while they ungratefully reject the offer which is made to them. Therefore, since by the Gospel the mercy of God is offered to both, it is faith, in other words, the illumination of God, which distinguishes between the righteous and the wicked, the former feeling the efficacy of the Gospel, the latter obtaining no benefit from it. Illumination itself has eternal election for its rule.
– John Calvin (Institutes of the Christian Religion – Book 3 Chapter 24 Section 17)