also peculiar; yet it by no means follows that it possesses a
substantial entity, or, as it were, displays personal activity among
phenomena; it rather indicates that the elements of the world will,
under given circumstances, act reciprocally in such a manner that we
perceive phenomena which group themselves together and which we call
magnetic or magnetism. And this explanation applies to other cases.

I therefore, speaking of psychical force in general, used the same
terms; I certainly did not wish to constitute it into a personal and
material entity of the universe, but I intended to assert that among the
manifestations of the various forces of the world, defined as above,
there is also this psychical force, characterized by phenomena and laws
peculiar to itself, and which, as I have shown, is when exercised one of
the greatest factors of the world. I repeat that if this force varies
with the greater or less perfection of the organisms in which, it is
manifested, yet it possesses a law and fundamental elements by which it
is so constituted that the same results will ensue in the simplest as
in the most complex form. This is the case with all the other forces of
nature; they may be modified by existing circumstances, and yet they
have laws and definite elements to distinguish them from all others.
These forces, however, while they are distinct in their peculiar
manifestations, and take effect through special qualities, quantities,
and rhythmic movements, are all fused together in the infinite and
eternal unity which constitutes the life of the universe. Neither here
nor in my former work is there any question of that most difficult
problem, the individual personality of man.[5]

Since there is between man and animals a relationship and a psychical
identity, as well as a genetic continuity of evolution, it is impossible
to deny that there is also in some degree a like continuity in the