I wanted to fully understand the meaning of what Jesus said, so I prayed about it. I was reading in my Amplified Bible, and the Lord opened up my understanding of salt.
II Kings 2:19-22 Amp
19. And the men of the city said to Elisha, Behold, inhabiting of this city is pleasant, as my Lord sees, but the water is bad and the locality causes miscarriage and barrenness [in all animals].
20. He said, Bring me a new bowl and put salt [the symbol of God's purifying power] in it. And they brought it to him.
21. Then Elisha went to the spring of the waters and cast the salt in it and said, Thus says the Lord, I [not the salt] have healed these waters; there shall not be any more death, miscarriage or barrenness [and bereavement] because of it.
22. So the waters were healed to this day, as Elisha had said.
When I read verse 20, that the salt is the symbol of God's purifying power, I thought of how the Holy Spirit refines us in our Christian walk. I also thought about God's covenant with us, through His Son, Jesus Christ. He gave us the Covenant of Salvation, so we can also say that "there is salt between us." I also thought about the scripture, "Greater is He that is within us, than he that is in the world.
Also, remember what happened to Lot's wife? She turned into a pillar of salt when she disobeyed God. She was told to not look back and she did.
When I read this-the Lord showed me what Jesus meant when he said we are the salt of the earth. Salt is used as a seasoning, and also as a preservative. If left out on the bare earth or exposed to the sun, rain, and air, it loses its savor which makes it worthless.
Matt. 5:13 KJV
Ye are the salt of the earth: but if the salt have lost his savour, wherewith shall it be salted? It is henceforth good for nothing, but to be cast out, and to be trodden under foot of men.I think Jesus was talking about us taking care of our salvation, our covenant of salvation. Also, I ran across this article about salt and light that you may enjoy reading.