a. Opinion of Others
18. And it is said [Alexander of Hales, ST II-II n.285 q.1] that an eternal penalty corresponds per se to venial sin, but per accidens a temporal one.
19. Proof of the first, that if someone is damned for mortal sin and along with venial sin, he will always be punished for the venial sin, otherwise there could be redemption in hell from some sin; but he will not be punished by God for it eternally unless an eternal punishment were justly due to it.
20. Proof of the second, that venial sin stands with the charity by which a man is ordained to the kingdom, and consequently for that reason a temporal penalty is due to venial sin.