On all these points, in so far as they bear on our present purpose, we must do what we can to work out some approximate explanation.
It is abundantly evident that the Circuit is a cause; it modifies, firstly, itself and its own content, and undoubtedly also it tells on the terrestrial, not merely in accordance with bodily conditions but also by the states of the soul it sets up; and each of its members has an operation upon the terrestrial and in general upon all the lower.
Whether there is a return action of the lower upon the higher need not trouble us now: for the moment we are to seek, as far as discussion can exhibit it, the method by which action takes place; and we do not challenge the opinions universally or very generally entertained.
We take the question back to the initial act of causation. It cannot be admitted that either heat or cold and the like what are known as the primal qualities of the elements — or any admixture of these qualities, should be the first causes we are seeking; equally inacceptable, that while the sun’s action is all by heat, there is another member of the Circuit operating wholly by cold — incongruous in the heavens and in a fiery body — nor can we think of some other star operating by liquid fire.