But the Deity sends out a constant succession of these waves, so that at any given time we find a number of them simultaneously in operation.

We ourselves represent one such wave; but we find evolving alongside us another wave which ensouls the animal kingdom--a wave which came out from the Deity one stage later than we did.

We find also the vegetable kingdom, which represents a third wave, and the mineral kingdom, which represents a fourth; and occultists know of the existence all round us of three elemental kingdoms, which represent the fifth, sixth and seventh waves.

All these, however, are successive ripples of the same great outpouring from the Second Aspect of the Deity.
We have here, then, a scheme of evolution in which the divine Life involves itself more and more deeply in matter, in order that through that matter it may receive vibrations which could not otherwise affect it--impacts from without, which by degrees arouse within it rates of undulation corresponding to their own, so that it learns to respond to them.

Later on it learns of itself to generate these rates of undulation, and so becomes a being possessed of spiritual powers.
We may presume that when this outpouring of life originally came forth from the Deity, at some level altogether beyond our power of cognition, it may perhaps have been homogeneous; but when it first comes within practical cognizance, when it is itself in the intuitional world, but is ensouling bodies made of the matter of the higher mental world, it is already not one huge world-soul but many souls.