“Anciently, obtaining a testimony was one reason for fasting. The Old Testament and the Book of Mormon tell of people fasting for a variety of reasons: comfort at the death of a loved one (see 2 Sam. 1:12; Alma 30:2); help for the sick (see Matt. 17:18–21); overcoming sin (see Isa. 58:6); and help in missionary work (see Alma 17:9)” (Black, 400 Questions and Answers, 150–51).