For one of the world's most distinguished writers to experiment with a little-known drug would, doubtless, in itself stir considerable interest. Obviously, it makes a vast difference that Mr. Huxley can tell us his experience in language that is a pleasure as well as a profit to read.
-- J.B. Rhine, Greensboro, N.C., Daily News

Whether you agree that the experiment was worth trying or feel that the author is knocking on doors that 'should' be left untouched, you are likely to admit that a challenge is forcibly put, that ideas are freshly and prodigally presented, and that even to try to answer Mr. Huxley honestly might well be a valuable experience in itself.
-- J.J. Jackson, San Francisco Chronicle