"Now no one after lighting a lamp covers it over with a container, or puts it under a bed; but he puts it on a lampstand, so that those who come in may see the light." Luke 8:16
There are some people who are embarrassed to take a stand for their faith and don't tell anyone about their beliefs. They live in the midst of the unbelievers, have the same lingo and superficial taste. But those who have received the true Light, the fire of the Holy Spirit burns within them the desire to please and proclaim their beloved Lord.