Individuals must cultivate self-mastery, purity, and freedom from depraving habits to preserve their physical and mental powers for service.

Original passage

The requirements of God must be brought home to the conscience. Men and women must be awakened to the duty of self-mastery, the need of purity, freedom from every depraving appetite and defiling habit. They need to be impressed with the fact that all their powers of mind and body are the gift of God, and are to be preserved in the best possible condition for His service.