Those who have received instruction regarding the evils of the use of flesh foods, tea and coffee, and rich and unhealthful food preparations, and who are determined to make a covenant with God by sacrifice, will not continue to indulge their appetite for food that they know to be unhealthful. God demands that the appetites be cleansed, and that self-denial be practiced in regard to those things which are not good. This is a work that will have to be done before His people can stand before Him a perfected people.—Testimonies for the Church 9:153, 154. SUFF 16.1