In this reissue, in Huxley's centenary year, he quotes from Chinese Taoists, from followers of Buddha and Mohammed, from the Brahmin scriptures and from Christian mystics such as St John of the Cross to illustrate his belief in a universal truth. Beneath the revelations of all the great world religions, the teachings of the wise and the holy of all faiths and the mystical experiences of every race and age, Huxley believed there was a basic unity of belief which is the closest approximation mankind can make to truth and ultimate reality.