As soon as a life knows Jesus as Saviour, it asks the question, "What wilt thou have me to do, Lord?" Notice, it is not, what shall I believe, or what shall I cast out of my life? Doing regulates both of these, and the "expulsive power of a new affection" settles nearly every problem by displacement. This, after all, is Christianity--to be "In Christ." "Not to be ministered unto, but to minister." "He that would be greatest, let him be the servant of all." The quality of Christianity is Service. The task of the Sunday school is the raising of the life by information, inspiration and opportunity to its highest possible attainment. Christian service is both the highest and the best. To the acknowledgment of Jesus as Saviour and Lord, then, must be added the free, voluntary, loving service for others in His name. This is the Upbuilding of the Spiritual Life of the Boy. What shall be used, then, for this purpose? Everything that will minister to the result--Organization, Leadership, Bible Study, Through-the-Week Activity, Material Equipment, Teaching, Song, Prayer, Reproof, Inspiration, Guidance, and all else that the Sunday school may know or discover. Two factors in it all are preeminent: Christ and the Boy. All else are but means. The boy a loving, serving follower of his Lord! This is the endless end. What should the Sunday school do to achieve this? Reach to the utmost, strive to the uttermost, use every resource, redeem every opportunity, create, discover and harness every method, hold the boy to his best, patiently see him develop, give him the material and spiritual elements for his growth, afford him opportunity to find himself, help him to crystalize his thought for life and lovingly aid him to meet, know and acknowledge his Lord. Thus the boy will be "built up in our most holy faith"--the faith that loves and serves in healthy life for the joy of living. BIBLIOGRAPHY ON THE BOY'S SPIRITUAL LIFE Alexander (Editor).--Boy Training (Chapter on "The Goal of Adolescence") (.75). Sunday School and the Teens (Chapter on "The Church's Provision for Adolescent Spiritual Life") ($1.00). Boys' Work Message, Men and Religion Movement (Chapters on "The Boy's Religious Needs" and "The Message of Christianity to Boyhood") ($1.00). XIX THE TEEN AGE TEACHER[11] The greatest problem that faces the Sunday school and Church as it seeks to meet the needs of the boys and girls of the teen age is leadership. The organized men's and women's Bible classes may meet that need. In fact, the success and ultimate value of these classes lie in their response and ability to face and supply this growing need.