The next highest form among the mammals are known as the _placentals_, or those which bring forth mature young. In this class are found the ant-eaters, sloth, manatee, the whale and porpoise, the horse, cow, sheep, and other hoofed animals; the elephant, seal, the dog, wolf, lion, tiger, and all flesh eating animals; the hares, rats, mice, and ail other gnawing animals; the bats, moles, and other insect-feeders; then come the great family of apes, from the small monkeys up to the orang-outang, chimpanzee, and other forms nearly approaching man. And then comes the highest, Man, from the Kaffir, Bush-man, Cave-man, and Digger Indian, up through the many stages until the highest forms of our own race are reached. From the Monera to Man is a long path, containing many stages, but it is a path including all the intermediate forms. The Yogi Teachings hold to the theory of evolution, as maintained by modern Science, but it goes still further, for it holds not only that the physical forms are subject to the evolutionary process, but that also the "souls" embodied in these forms are subject to the evolutionary process. In other words the Yogi Teachings hold that there is a twin-process of evolution under way, the main object of which is to develop "souls," but which also finds it necessary to evolve higher and higher forms of physical bodies for these constantly advancing souls to occupy. Let us take a hasty glance at the ascending forms of animal life, as they rise in the evolutionary scale. By so doing we can witness the growth of the soul, within them, as manifested by the higher and higher physical forms which are used as channels of expression by the souls within. Let us first study soul-evolution from the outer viewpoint, before we proceed to examine it from the inner. By so doing we will have a fuller idea of the process than if we ignored the outer and proceed at once to the inner. Despise not the outer form, for it has always been, and is now, the Temple of the Soul, which the latter is remodelling and rebuilding in order to accommodate its constantly increasing needs and demands.