Jesus said… (in Luke 8:16-21)
16 “No one after lighting a lamp covers it with a jar or puts it under a bed, but puts it on a stand, so that those who enter may see the light. 17 For nothing is hidden that will not be made manifest, nor is anything secret that will not be known and come to light. 18 Take care then how you hear, for to the one who has, more will be given, and from the one who has not, even what he thinks that he has will be taken away.”

19 Then his mother and his brothers came to him, but they could not reach him because of the crowd. 20 And he was told, “Your mother and your brothers are standing outside, desiring to see you.” 21 But he answered them, “My mother and my brothers are those who hear the word of God and do it.”

“Let us not only think of ourselves. Let us also think of others. There are millions in the world who have no spiritual light at all. They are without God, without Christ, and without hope. (Eph. 2:12) Can we do nothing for them? There are thousands around us who are unconverted and dead in sins, seeing nothing and knowing nothing right. Can we do nothing for them? These are questions to which every true Christian ought to find an answer. We should strive, in every way, to spread our religion. The highest form of selfishness is that of the person who is content to go to heaven alone. The truest charity is to endeavor to share with others every spark of religious light we possess ourselves, and so to hold up our own candle that it may give light to every one around us. Happy is that soul, which, as soon as it receives light from heaven, begins to think of others as well as itself! No candle which God lights was ever meant to burn alone.”
— J. C. Ryle,
from his Expository Thoughts on the Gospel of Luke, Banner of Truth, 1986