From The Second Comforter, Chapter 9
To be most meaningful, sacrifice by one person should bless and benefit another person. When Isaiah taught the highest principles and aspirations of the law of the fast, he linked it to blessing others. This is exactly what the Church’s fast offering program allows the Saints to do. Isaiah wrote:
Wherefore have we fasted, say they, and thou seest not? Wherefore have we afflicted our soul, and thou takest no knowledge? Behold, in the day of your fast ye find pleasure, and exact all your labours. Behold, ye fast for strife and debate, and to smite with the fist of wickedness: ye shall not fast as ye do this day, to make your voice to be heard on high. Is it such a fast that I have chosen? A day for a man to afflict his soul? Is it to bow down his head as a bulrush, and to spread sackcloth and ashes under him? wilt thou call this a fast, and an acceptable day to the Lord? Is not this the fast that I have chosen? to loose the bands of wickedness, to undo the heavy burdens, and to let the oppressed go free, and that ye break every yoke? Is it not to deal thy bread to the hungry, and that thou bring the poor that are cast out to thy house? when thou seest the naked, that thou cover him; and that thou hide not thyself from thine own flesh? (Isa. 58: 3–7, emphasis added.)
Here He is teaching the difference between meaningless sacrifice as a hollow religious observance, in contrast to relieving the suffering of others through your fasting (and sharing abundance). Helping and blessing others is the highest form of sacrifice. When you act to relieve the burdens of others, you are acting as Christ would. You are rising to another level of living where angels themselves dwell. You are becoming a “type” of Christ. It is not merely asking yourself “what would Jesus do?” but rather it is doing what Jesus did and commanded you to do. Action in conformity to commandments brings light into your life. You follow His path and you will be walking up that same mountain in which you, too, will be transfigured.