An ultra spiritualism must become pantheism, and pantheism must go on to polytheism.

In India this is not a theory, but a history.

We find, side by side, a spiritualism which denies the existence of anything but motionless spirit or Brahm, and a polytheism which believes and worships Brahma the Creator, Siva the Destroyer, Vischnu the Preserver, Indra the God of the Heavens, the Sactis or energies of the gods, Krishna the Hindoo Apollo, Doorga, and a host of others, innumerable as the changes and appearances of things.
But such a system as this must necessarily lead also to idolatry.

There is in the human mind a tendency to worship, and men must worship something.
But they believe in one Being, the absolute Spirit, the supreme and only God,--Para Brahm; _him_ they cannot worship, for he is literally an unknown God.

He has no qualities; no attributes, no activity.