Here the new psychology comes in contact with religion. What is the practical aim of all the great religions of the world but a surrender of the ego, a renunciation of the self as the centre of our being, and the acceptance of the moral law as the regulative power of our actions? The new psychology gives a justification and a scientific explanation of Christian ethics while the latter from the standpoint of the old psychology necessarily appears as mystical and supernatural. IX. PERSONALITY AND EVOLUTION. The ego, i. e. the centre of consciousness, is constantly shifting, while the personality of a man is relatively constant, certain important ideas being stable and thus lending character to the whole system of thoughts and intentions. The term personality indicating the self-hood of a man is used in several ways. First, we understand by a man’s personality his bodily appearance; secondly the whole system of his mentality, viz. his knowledge, his temperament, his character; thirdly the history of his life, past, present, and future; fourthly his position in life, his possessions, his connections, his influence, or at last we mean by it all these four items together. In all these applications the man and his personality are conceived as a unity. And they are a unity. Wherever the term unity is applicable, it is most certainly applicable here. All the many facts of the history of his life are one continuous process; all the parts of his body are parts of a system, and the world of his ideas also will under normal conditions bear a certain harmonious character. Wherever in any soul the concord among the ideas has been disturbed, a state of unrest will ensue until the peace of soul is restored in one or another way. But with the same necessity as every water surface tends to present a smooth level, so the ideas in one and the same soul tend to come to a state of agreement. As every water surface has its ripples so even that mind which has attained an undisturbed peace of soul is constantly confronted with some problems—be they ever so trifling—producing some slight disturbances in his life. The unity of a self, it is apparent, is the inevitable consequence of given conditions. It is not something which exists outside the personality and its constituent parts, it is in the personality and it develops together with it. Mr. Conybeare supposes that “the unity of a self remains the same throughout.” This is an error, and this error vitiates Mr. Conybeare’s whole conception of growth and evolution. He says: “Properly speaking a thing can only be said to grow or develop when it remains the same with itself all through the process and unfolds therein capacities which were anyhow latent in it to start with.”