Theophylact of Ohrid
Catena Aurea · Markusevangelium 9
And if thy hand offend thee, cut it off: it is better for thee to enter into life maimed, than having two hands to go into hell, into the fire that never shall be quenched: Where their worm dieth not, and the fire is not quenched. And if thy foot offend thee, cut it off: it is better for thee to enter halt into life, than having two feet to be cast into hell, into the fire that never shall be quenched: Where their worm dieth not, and the fire is not quenched. And if thine eye offend thee, pluck it out: it is better for thee to enter into the kingdom of God with one eye, than having two eyes to be cast into hell fire: Where their worm dieth not, and the fire is not quenched. For every one shall be salted with fire, and every sacrifice shall be salted with salt. Salt is good: but if the salt have lost his saltness, wherewith will ye season it? Have salt in yourselves, and have peace one with another.
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. But if it be without saltness, that is, if its virtue of drying up and preserving be gone, with what shall it be salted?