If persons live long in sin…

If persons live long in sin, though they be converted at last, yet they still have the ill habits that they contracted while they lived in sin. Those sins were so riveted onto them that grace doesn’t perfectly root them out, and they will be a great disadvantage and hindrance.

Jonathan Edwards, quoted in Stand Fast In the Way of Truth by Douglas Bond, p. 41

The magnitude of the punishment…

The magnitude of the punishment matches the magnitude of the sin. Now a sin that is against God is infinite; the higher the person against whom it is committed, the graver the sin—it is more criminal to strike a head of state than a private citizen—and God is of infinite greatness. Therefore an infinite punishment is deserved for a sin committed against Him.

Thomas Aquinas, from Summa Theologica, Ia2ae. 87, 4

Because the world is in rebellion…

However faithfully and clearly one preaches the Gospel, at a certain point, the world, because it is in rebellion, will turn from it. Men turn away not because what is said makes no sense, but because they do not want to bow before the God who is there.

Francis Schaeffer, from The God Who Is There, p. 102

Anselm argues that sin is an offense…

Anselm then argues that sin is an offense against God, for which a satisfaction is required. As God is infinite, an infinite satisfaction is required. But as man is finite, he can’t pay this satisfaction.

Alister McGrath, from Understanding Jesus, p. 165