The will-power plays a great part in character-building. And the will-power becomes feeble when a person yields to every little tendency, inclination, and fancy he has; but when a person fights against every little fancy and tendency and inclination he learns to fight with himself, and in this way he develops willpower. When once a person's inclinations, fancies, and tendencies have grown stronger than his will-power, he experiences in his life several enemies existing in his own self, and he finds it difficult to combat them. For inclinations, fancies, and tendencies, when powerful, do not let will-power work against them. If there is any such thing as self-denial, it is this practice; and by this practice in time one attains to a power which may be called mastery over oneself.