Numbers 18:19
. . .it is a covenant of salt for ever before the LORD unto thee and to thy seed with thee.
Since ancient times, salt has had an important place in people's lives. It is not only a preservative but makes food palatable, and men and animals instinctively seek to supplement or improve their regular diet with salt.
Salt was a necessary ingredient in the Levitical sacrifices. It represented the covenant of God, which was one of permanent continuance and perpetual obligation: And every oblation of thy meat offering shalt thou season with salt; neither shalt thou suffer the salt of the covenant of thy God to be lacking from thy meat offering: with all thine offerings thou shalt offer salt. Lev. 2:13.
The custom of pledging friendship or confirming a compact by eating food containing salt is still retained among Arabic-speaking people. The Arabic word for salt and for a compact or treaty is the same. Once an Arab has received in his tent even his worst enemy and has eaten salt (food) with him, he is bound to protect his guest as long as he remains.
The Lord gave over the kingdom of Israel to King David and his sons by a covenant of salt. 2 Chron. 13:5. This was a pledge from God and an unconditional promise that the kingdom would remain in the Davidic line.
In Matt 5:13, the Lord calls the believers the salt of the earth. Salt is a preservative. If we have God's salt in us, we can preserve a witness to His Truth and see His purposes fulfilled in and through our lives. Salt that has been contaminated loses its strength when subjected to extremes of temperature and climate (especially dampness) because the impurities react chemically with the salt and rob it of its savor, making it good for nothing - useless.
Believers are surrounded continually by evil and impurity. This evil can overwhelm anyone if the proper precautions are not taken. We must be filled with The Word of God. Let the word of Christ dwell in you richly in all wisdom... Col. 3:16. Then, and only then, can Col. 4:6 be fulfilled in our lives: Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer every man.
Christians should be worth their salt and not be laid on the shelf because they have lost their savor—the secret - faithfulness to The Word.
