Because we insist that even the sun depends, for its heartbeat, its respiration, its pivotal motion, on the beating hearts of men and beast, on the dynamic of the soul-impulse in individual creatures.

It is from the aggregate heartbeat of living individuals, of we know not how many or what sort of worlds, that the sun rests stable.
Which may be dismissed as metaphysics, although it is quite as valid or even as demonstrable as Newton's Law of Gravitation, which law still remains a law, even if not quite so absolute as heretofore.
But this is a digression.

The argument is, that between an individual and any external object with which he has an affective connection, there exists a definite vital flow, as definite and concrete as the electric current whose polarized circuit sets our tram-cars running and our lamps shining, or our Marconi wires vibrating.

Whether this object be human, or animal, or plant, or quite inanimate, there is still a circuit.

My dog, my canary has a polarized connection with me.
Nay, the very cells in the ash-tree I loved as a child had a dynamic vibratory connection with the nuclei in my own centers of primary consciousness.