“Bonum est sal : quod si sal insulsum fuerit, in quo illud condietis ? Habete in vobis sal, et pacem habete inter vos.”
“For every one shall be salted with fire, and every sacrifice shall be salted with salt.”
“For everyone will be salted with fire.”
“For everyone will be salted with fire, and every sacrifice will be seasoned with salt.”
“For every one shall be salted with fire.”
Become unsavoury; i.e. if he, who has once received the faith, should apostatize from it, what is there that can possibly convert him from his wicked ways? since even the salt, with which he was salted, is become unsavoury, i.e. the doctrines he formerly received are no longer of any use. (Nicholas of Lyra)
Verses 41-50 It is repeatedly said of the wicked, Their worm dieth not, as well as, The fire is never quenched. Doubtless, remorse of conscience and keen self-reflection are this never-dying worm. Surely it is beyond compare better to undergo all possible pain, hardship, and self-denial here, and to be happy for ever hereafter, than to enjoy all kinds of worldly pleasure for a season, and to be miserable for ever. Like the sacrifices, we must be salted with salt; our corrupt affections must be subdued and mortified by the Holy Spirit. Those that have the salt of grace, must show they have a living principle of grace in their hearts, which works out corrupt dispositions in the soul that would offend God, or our own consciences.