...may we remember that “we must be different in order to make a difference” in a darkening world (Neal A. Maxwell, Deposition of a Disciple [Salt Lake City: Deseret Book, 1976], 55).
Thus, as insignificant as we feel our lights can be, they become brighter simply by contrast as the darkening occurs. Nowhere is that contrast more apparent than in our unwavering commitment to the family.
The full talk with many accounts of conversion stories:
BYU talk by Damon L. Bahr