The child comes into the world devoid of all knowledge and understanding. His mind, though at the beginning a blank, is a potential seedbed in which we may plant what teachings we will. The babe born into our home to-day can with equal ease be made into a Christian, a Buddhist, or a Mohammedan. He brings with him the instinct to respond to the appeal religion makes to his life, but the kind and quality of his religion will depend largely on the religious atmosphere he breathes and the religious ideas and concepts placed in his mind through instruction and training. What, then, shall we teach our children, in religion? If fruitful knowledge is to be one of the chief aims of our teaching, _what_ knowledge shall we call fruitful? What are the great foundations on which a Christian life must rest? Years ago Spencer wrote a brilliant essay on _knowledge of most worth_ in the field of general education. What knowledge is of most worth in the field of religious education? For not all knowledge, as we have seen, is of equal value. Some religious knowledge is fruitful because it _can be set at work_ to shape our attitudes and guide our acts; other religious knowledge is relatively fruitless because it _finds no point of contact_ with experience. To answer our question we must therefore ask: "What knowledge will serve to guide the child's foot-steps aright from day to day as he passes through his childhood? What truths will even now, while he is still a child, awaken his spiritual appreciation and touch the springs of his emotional response to the heavenly Father? What religious concepts, once developed, will lead the youth into a rich fullness of personal experience and develop in him the will and capacity to serve others? What religious knowledge will finally make most certain a life of loyalty to the church and the great cause for which it stands?" When we can answer these questions we shall then be able to say what knowledge is of most worth in the religious training of our children. THE CHILD'S CONCEPT OF GOD The child must come to know about God, even as a little child. Long before he can understand about _religion_, he can learn about a heavenly Father. This does not imply that the child (or that we ourselves!) can know God in any full or complete way. Indeed, a God who could be known in his entirety by even the deepest and wisest finite mind would be no God at all. Yet everyone must give some meaning to God. Everyone does have some more or less definite idea, image, or mental picture of the God he thinks about, prays to, and worships.