To know of, think about-- Is all man's sum of faculty effects, When exercised on earth's least atom. What was, what is, what may such atoms be?-- Unthinkable, unknowable to man. Yet, since to think and know fire through and through Exceeds man, is the warmth of fire unknown? Its uses--are they so unthinkable? Pass from such obvious power to powers unseen, Undreamed of save in their sure consequence: Take that we spoke of late, which draws to ground The staff my hand lets fall; it draws at least-- Thus much man thinks and knows, if nothing more. These lines were written in reference to Keely's discovery of the infinite subdivision of the atom; for not until a much later period was Browning influenced by a New York journalist to look upon Keely as "a modern Cagliostro." Keely's discovery was the key-note of "Ferishtah's Fancies," written by Browning before he met this journalist. Professor Koenig writes:--I have long given up the idea of understanding the Universe; with a little insight into its microcosm, I would feel quite satisfied; as every day it becomes more puzzling. But there are no boundaries set to knowledge in the life of the Soul, and these discoveries reach out so far towards the Infinite, that we are led by them to realize how much there is left for science to explore in the supposed unfathomable depths of the etheric domain, whence proceeds the influence that connects us with that infinite and eternal energy from which all things proceed.