1. Taste: Let us consider what is the meaning of salt. Firstly, it adds to the taste. Human beings in every country like to have salt in their food. Any dish may be very well cooked, but if it has no salt nobody will like the taste. Those who have high blood-pressure, and there are many such nowadays, are advised not to take salt in their diet. You can imagine how much they suffer. Even though you eat a large quantity of food, if it is without salt, you are not satisfied. A small quantity of salt can give much taste to food. The Lord’s intention is to gather to Himself a people who, like salt, can bring health and enjoyment to the whole world.
2. Faithfulness: Salt represents faithfulness. There is a saying in Hindi which says, ‘Be not ungrateful to him whose salt you have eaten.’ There is a story of a thief who went to rob a house. As it was empty, he was able to open one box after another and gather much loot. He made a very large bundle of it and placed it on his head. As he was about to leave the house he noticed something on a shelf. He thought it must be sugar and put a small quantity into his mouth. It was salt. Then he said to himself, ‘I have eaten the salt of this house, so how can I rob this wealth from here?’ So, the story says, he left the whole bundle there and went away. Thus, salt is usually spoken of as representing loyalty and faithfulness.
3. Preservation: Salt is also used to preserve things. Generally butter gets spoiled if kept too long, but if you add a little salt to it, it keeps for a long time. In the same manner, if you put rock-salt in ghee (clarified butter) it will remain in good condition for many months; otherwise it will smell bad after some days. Salt is also used to preserve pickles. Fish, beef and mutton are also preserved with salt. Thus salt represents something that preserves things for a long time.
4. Friendship: Salt also represents an abiding friendship. In 2 Chronicles 13:5, we read of a ‘ covenant of salt’. In the margin it is rendered ‘a perpetual covenant of friendship’. Every meat offering in the Old Testament was offered with salt (Lev. 2:13; Mark 9:49, 50). So salt represents eternal life, and faithfulness in friendship and love. These sacrifices were offered in order to obtain God’s friendship. All this helps us to understand why the Lord Jesus said to His disciples, ‘Ye are the salt of the earth’. In all that He said and did He had one object, that through them He might provide salt for the health and enjoyment of the whole world.
BAKHT SINGH
from his book “True Salt” available online
KNOWING GOD 
Salt is the best example of the Holy Spirit ,without Him we are nothing !