But if the punishment due for our sins is put off till the next world, then it will be God's avenging justice, which puts everything to fire and sword, which will inflict the punishment, a dreadful, indescribable punishment: "Who understands the power of your anger?" Judgement without mercy, without relief, without merit, without limit and without end. Yes, without end. That serious sin you committed in a few brief moments, that deliberate evil thought which now escapes your memory, that word carried away by the wind, that brief action against the law of God - they shall all be punished for eternity, in the company of the devils in hell, so long as God is God. And this avenging God will have no pity on your torments, on your cries and tears, violent enough to cleave the rocks. To suffer forever, without merit, without mercy, and without end.
--St. Louis de Montfort, Letter to the Friends of the Cross