Matthew 5:13 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.
In ancient cultures salt was extremely valuable. Not only did salt add flavor to food, it was also used as a preservative. By drying meat and salting it the food would not spoil. It would actually be preserved until its life-giving nutrients were consumed.
When Jesus told His disciples that they were the "salt of the earth," they would have immediately recognized the significance of that.
Think of the importance and implications of being told such a thing. The flavor they were to add to the world speaks of the abundant life Jesus came to give (John 10:10). Their role as a preservative required deeper understanding.
Without the spiritual presence of God in this world, darkness would quickly overtake everything. After the rapture of the saints from the earth, evil will have its way (2 Thessalonians 2:1-12). But as long as Christians are on earth, the Holy Spirit is working through them to convict the world of sin, righteousness, and judgment (John 16:8-11)
By living for Christ today, you add abundant flavor to this world and hold back the darkness so that more might believe.
We are the salt of the earth . . . not the sugar. Our ministry is to truly cleanse and not just to change the taste.