Matthew 5:13 says, 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.  We, as followers of Christ, are called the salt of the earth.  We are to enhance life for those we meet, just as salt enhances the flavor of food.  I also believe that just as salt can help preserve food, we as followers of Christ can spread His word to help others come to a preserving knowledge of God.  Salt is of no use if it is not used, and we are of no use to God if we are unwilling to spread His word.  Just as a little salt can flavor a lot of food, so can a little faith reach a lot of people if we only reach out in the love of God.  Verse fourteen states, Ye are the light of the world. A city that is set on an hill cannot be hid.  The lost of the world stumble around in spiritual darkness today, and if they are ever to see the light of salvation, we as followers of Christ must shed His light into the world.  We are to be like the light of a city set on a hill.  We should never cower in fear of the world, but should continually shed God's light into the world.   Verse fifteen states, 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.   I believe that this is telling us to never attempt to hide the light of Christ from the world.  People should know by the way that we live that there is something different about us if we are indeed followers of Christ.  We are not called on to hide our faith, but to be a shining light in the world.  Verse sixteen states, Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.  When we shine the light of Christ on the world, we should do so that the lost might see the light and God might be glorified.  The light that we shine should never point to us, but must always point to God.  Verse seventeen declares, Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.  Jesus came to live up to the law of God that it might be fulfilled.  The things taught by the law of God were not destroyed, but Jesus once more put the emphasis on the relationship one has with God and not on the ritualistic following of the law.  Verse eighteen says, For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.  We are told as long as heaven and earth stand that not even the least point of God's law will pass away.  When the new heaven and earth come, we will not need the law, because we will all be children of God by faith, and sin and death will have been defeated for all time.  Verse nineteen states, Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.  If we break the least of God's commandments and teach others to do so, we will be called the least in the kingdom of heaven.  We will still be a part of that kingdom, because we are saved by faith in Christ and not by the law.  Still, we will be the least in the kingdom of God.  The opposite is also true.  If we follow God's law and teach others to do so, we will be called great in God's kingdom, though we can never do this simply hoping to be greater.  We must do so because it is what God expects of His people.  Verse twenty declares, For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven.  If we are looking to find salvation through the law of God, then our righteousness must exceed the righteousness of the scribes and Pharisees, who saw themselves as superior to all others in keeping the letter of the law, and yet they did not know the spirit of the law.  Being super religious without a relationship with Christ as Savior and Lord will never bring anyone salvation.