I feel morally convinced--that is, I would
bet heavily--that the future will corroborate all this "telepathy," etc. as a field of real experience surrounding the acknowledged order of nature, and of tremendous cosmic import, whatever that import may be. I am positively persuaded that we dip our roots into a common pool where minds communicate, by gleams and flashes, but I have no plausible hypothesis as to the
organization of the pool, whether it contain spirits or not, and if so, of how many sorts.
Believe me, with wishes for the success of the book,
Yours very truly,
(Signed) WILLIAM JAMES.
CAMBRIDGE, November 16, 1908.