Which term to employ all depends on the mode of action we are contemplating.

If it is construction from without, then we are dealing with the purely material universe.

If we are seeking to bring about results by the exercise of our mental power from within, then we are dealing with the Soul of Nature.

It is that control of the lower degree of intelligence by the higher of which I have spoken in my Edinburgh Lectures.
If we realize what I have endeavored to make clear in the earlier portion of this book, that the whole creation is produced by the operation of the Divine Will upon the Soul of Nature, it will be evident that we can set no limits to the potencies hidden in the latter and capable of being brought out by the operation of the Personal Factor upon it; therefore, granted a sufficiently powerful concentration of will, whether by an individual or a group of individuals, we can well imagine the production of stupendous effects by this agency, and in this way I would explain the statements made in Scripture regarding the marvelous powers to be exercised by the Anti-Christ, whether personal or collective.

They are psychic powers, the power of the Soul of Man over the Soul of Nature.