"There are definite stages in the earlier evolution — the vegetable above the mineral, the animal above the vegetable and the human above the animal—so in the same way the human kingdom has a definite end, a boundary at which it passes into a kingdom distinctly higher than itself, that beyond men there are the Supermen. In the study of this system of evolution, we have learnt that there are in every man three great divisions—body, soul and spirit; and each of these is capable of further subdivision. That is the definition which was given by St. Paul two thousand years ago."