The spiritual nature needs food as does the physical. If the physical life is poorly nourished in this time of the most rapid development, a loss of vitality and power is the inevitable result. The same is true of the mental life. There must be healthful, attractive, abundant food for interesting, enjoyable thought. And just as surely the spiritual life, unless the emotions and moral sense are nourished, will yield to slow paralysis or run into wrong and wasteful channels. But there comes a time in the spiritual experience of the girl, usually about sixteen, when she wants to do something to express the longing to give herself which is growing more intense each year. If the Sunday-school and church are together able to provide her with work she is fairly safe for the next few years. The work will mean definite interest, will call for some sacrifice, and will bring the satisfaction of accomplishment. The spiritual side of her nature will find in this way opportunity for immediate expression, and we must never let the fact escape us that without opportunity for expression abundant life is impossible. Sooner or later there is bound to come to the average girl in her teens a period of doubting, anxious questioning. Most often it appears at the very end of the period. The outcome of this longer or shorter period of turmoil in thought may be a much broader, deeper faith in the Christian ideals and the realities of life, or it may be a drifting away from the church and the loss of definite faith in anything. There are in the world many more people who will not _do_ than who will not _believe_, but a large and growing number of young women are questioning, doubting, and finally deciding that we can not know, and that the faith of our childhood is without reasonable foundation. Some of these will seek satisfaction for the spiritual nature in later years in all sorts of “isms,” “ists,” and cults; some will drop all definite terms of faith and find a measure of satisfaction in educational work among the poor. Some will grow hard and cynical, lose all interest in any visible form of religion, and give themselves over to a good time. The doubters and questioners are often thoughtful, sincere young people, with mental ability of the best sort and high moral sense, and every Sunday-school teacher who has any influence with them must put forth every possible effort to save them, for their own sake and that of the world. For the world can ill afford to lose its women of faith.