2nd Nephi 26: 30-31
Behold, the Lord hath forbidden this thing; wherefore, the Lord God hath given a commandment that all men should have charity, which charity is love. And except they should have charity they were nothing. Wherefore, if they should have charity they would not suffer the laborer in Zion to perish. But the laborer in Zion shall labor for Zion; for if they labor for money they shall perish.
Love is the key to our work for the lord. If we try to serve God for the wrong reasons, it will be for naught. We have to serve God with love and not self interest