"You are like salt for all mankind.

But if salt loses its saltiness,

there is no way to make it salty again.

It has become worthless,

so it is thrown out

and people trample on it."

"You are like the light

for the whole world.

A city built on a hill cannot be hid.

No one lights a lamp and puts it under a bowl;

instead he puts it on the lampstand,

where it gives light

for everyone in the house.

In the same way

your light must shine

before people,

so that they will see

the good things you do

and praise your Father in heaven."

Matthew 5:13-15