with a contracted common sense. They are universal only in the
sense that they take one thin explanation and carry it very far.
But a pattern can stretch for ever and still be a small pattern.
They see a chess-board white on black, and if the universe is paved
with it, it is still white on black. Like the lunatic, they cannot
alter their standpoint; they cannot make a mental effort and suddenly
see it black on white.

Take first the more obvious case of materialism. As an explanation
of the world, materialism has a sort of insane simplicity. It has
just the quality of the madman's argument; we have at once the sense
of it covering everything and the sense of it leaving everything out.
Contemplate some able and sincere materialist, as, for instance,
Mr. McCabe, and you will have exactly this unique sensation.
He understands everything, and everything does not seem
worth understanding. His cosmos may be complete in every rivet
and cog-wheel, but still his cosmos is smaller than our world.
Somehow his scheme, like the lucid scheme of the madman, seems unconscious
of the alien energies and the large indifference of the earth;
it is not thinking of the real things of the earth, of fighting
peoples or proud mothers, or first love or fear upon the sea.
The earth is so very large, and the cosmos is so very small.
The cosmos is about the smallest hole that a man can hide his head in.

It must be understood that I am not now discussing the relation
of these creeds to truth; but, for the present, solely their relation
to health. Later in the argument I hope to attack the question of
objective verity; here I speak only of a phenomenon of psychology.
I do not for the present attempt to prove to Haeckel that materialism
is untrue, any more than I attempted to prove to the man who thought