"Human sexuality is not just a physical matter. In fact, chastity and fidelity begin in the spirit, not in the body. They are expressions of the condition of our spirit. When our spirit is in tune with gospel truths, we want to live high standards, and our actions reflect that desire. Thus, chastity and fidelity are more than sexual abstinence before marriage and sexual fidelity after marriage. They express the quality of our spiritual life."
Terrance D. Olson, "Truths of Moral Purity," Liahona, Oct. 1999, 31; see also Ensign, Oct. 1998, 43.