"Locke would have us begin with the study of spirits and go on to that of bodies. This is the method of superstition, prejudice, and error; it is not the method of nature, nor even that of well-ordered reason; it is to learn to see by shutting our eyes. We must have studied bodies long enough before we can form any true idea of spirits, or even suspect that there are such beings. The contrary practice merely puts materialism on a firmer footing. I am aware that many of my readers will be surprised to find me tracing the course of my scholar through his early years without speaking to him of religion. At fifteen he will not even know that he has a soul, at eighteen even he may not be ready to learn about it. For if he learns about it too soon, there is the risk of his never really knowing anything about it."