Watt 1975, стр. 366. Watt, Donald, ур. (1975). Aldous Huxley. Routledge. стр. 366. ISBN978-0-415-15915-9. Приступљено 10. 4. 2016. „Inge's agreement with Huxley on several essential points indicates the respect Huxley's position commanded from some important philosophers … And now we have a book by Aldous Huxley, duly labelled The Perennial Philosophy. … He is now quite definitely a mystical philosopher.”
Sion 2010, стр. 2. Sion, Ronald T. (2010). Aldous Huxley and the Search for Meaning: A Study of the Eleven Novels. McFarland & Company, Inc. стр. 2. ISBN978-0-7864-4746-6. Приступљено 10. 4. 2016. „Aldous Huxley, as a writer of fiction in the 20th century, willingly assumes the role of a modern philosopher-king or literary prophet by examining the essence of what it means to be human in the modern age. … Huxley was a prolific genius who was always searching throughout his life for an understanding of self and one's place within the universe.”
google.co.in
books.google.co.in
Sawyer, Dana (2002). Aldous Huxley: A Biography. The Crossroad Publishing Company. стр. 187. ISBN978-0-8245-1987-2. Приступљено 10. 4. 2016. „Huxley was a philosopher but his viewpoint was not determined by the intellect alone. He believed the rational mind could only speculate about truth and never find it directly.”
