Salt is good: but if the salt has lost its saltiness, how will you season it? Have salt in yourselves, and have peace one with another.
All Commentaries on Mark 9:50 Go To Mark 9
Methodius of Olympus
AD 311
According to levitical law, every gift, unless it be seasoned with salt, is forbidden to be offered as an oblation to the Lord God. Now the whole spiritual meditation of the Scriptures is given to us as salt which stings in order to benefit. Without this disinfection, it is impossible for a soul, by means of reason, to be brought to the almighty.