"You are the salt of the earth. But if the salt loses its saltiness, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled underfoot."
NIV
You are the salt of the earth, but if salt has lost its taste (its strength, its quality), how can its saltness be restored? It is not good for anything any longer but to be thrown out and trodden underfoot by men.
AMP
Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men.
KJV
"Salt is good, but if it loses its saltiness, how can you make it salty again? Have salt in yourselves, and be at peace with each other."
NIV
Salt is good (beneficial), but if salt has lost its saltness, how will you restore [the saltness to] it? Have salt within yourselves, and be at peace and live in harmony with one another.
AMP
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.
KJV