salt and light

you are the salt of the earth but if the salt loses its saltiness how can it be salty again it is no longer good for anything except to be thrown out and trampled by people you are the light of the world neither do people light a lamp and put it under a bowl or refuse to see the light at the end of the tunnel instead they put it on the stand and it gives light to everyone in the house they save everyone and make certain they all find that light at the end of the tunnel in the same way let your light shine before people that they may see good deeds and praise the one who made it all possible