Pseudo-Jerome — as excerpted in the Catena Aurea on Mark 9:43-50

“Or otherwise; That salt is saltless which loves the chief place, and dares not rebuke others. Wherefore there follows, Have salt in yourselves, and have peace one with another. That is, let the love of your neighbour temper the saltness of rebuke, and the salt of justice season the love of your neighbour.”