God will hold you responsible for those you might have saved

“If you do not magnify your calling, God will hold you responsible for those you might have saved, had you done your duty.”

- Pres. John Taylor, as quoted by Pres. Thomas S. Monson, Second Counselor in the First Presidency in “The Call of Duty,” General Conference, Apr 1986

http://www.lds.org/general-conference/1986/04/the-call-of-duty?lang=eng