Mark 9:49

(Vict. Ant. e Cat. in Marc.) Similar to this is that which the Apostle says, And the fire shall try every man's work of what sort it is. (1 Cor. 3:13.) Afterwards he brings in a witness from Leviticus: which says, And every oblation of thy meat offering shall thou season with salt. (Lev. 2:13.) (v. Vict. Ant. in Cat.) Or else it is meant, that every gift of our victim, which is accompanied by prayer and the assisting of our neighbour, is salted with that divine fire, of which it is said, I am come to send fire on earth. (Luke 12:49.)

(ubi sup.) But because the Lord had three times made mention of the worm and the fire, that we might be able to avoid this torment, He subjoins, For every one shall be salted with fire. For the stink of worms always arises from the corruption of flesh and blood, and therefore fresh meat is seasoned with salt, that the moisture of the blood may be dried off, and so it may not breed worms. And if, indeed, that which is salted with salt, keeps off the putrefying worm, that which is salted with fire, that is, seasoned again with flames, on which salt is sprinkled, not only casts off worms, but also consumes the flesh itself. Flesh and blood therefore breed worms, that is, carnal pleasure, if unopposed by the seasoning of continence, produces everlasting punishment for the luxurious; the stink of which if any man would avoid, let him take care to chasten his body with the salt of continence, and his mind with the seasoning of wisdom, from the stain of error and vice. For salt means the sweetness of wisdom, and fire, the grace of the Holy Spirit. He says therefore, Every one shall be salted with fire, because all the elect ought to be purged by spiritual wisdom, from the corruption of carnal concupiscence. Or else, the fire is the fire of tribulation, by which the patience of the faithful is proved, that it may have its perfect work.

(ubi sup.) We may also understand the altar to be the heart of the elect, and the victims and sacrifices to be offered on the altar are good works. But in all sacrifices salt ought to be offered, for that is not a good work which is not purged by the salt of wisdom from all corruption of vain glory, and other evil and superfluous thoughts.

For as salt preserves flesh, and suffers it not to breed worms, so also the discourse of the teacher, if it can dry up what is evil, constrains carnal men, and suffers not the undying worm to grow up in them.

The oblation of the Lord is the race of man, which is here salted by means of wisdom, whilst the corruption of blood, the nurse of rottenness, and the mother of worms, is being consumed, which there also shall he tried by the purgatorial firem.