I would like to state for the record that Glenn and Lee Perry have my endorsement as researchers of the highest caliber in the study of belief systems. I know I can trust them never to unnecessarily influence other humans and that their approach to floating will always follow the guidelines of my own personal and professional researches in "alternity." I heartily recommend their practice of floating, their methods of exploration, their uses of the benign and highly beneficial technology I have pioneered. The balanced, scientific, and pristine nature of their practice has been clear to me for years and so, not only for their expertise and their ingenuity, their skill and aptitude in tank manufacture, but also and especially for their genuine integrity and sincerity in this research....

-- John Lilly, M.D., from the Foreword