Matthew 5:13-16 “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. Ye are the light of the world. A city that is set on an hill cannot be hid. Neither do men light a candle, and put it under a bushel, but on a candlestick; and it giveth light unto all that are in the house. Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.”
To be salt and light is to influence our world for God. Salt retards spoilage and puts things in good taste. Light brings growth and warmth. So, let us not forget that God put believers here to help make this old world a habitable place and to help others on to Him. Again, let us not forget that God put us here for that purpose.