There is One Holy Book
'There is One Holy Book, the sacred manuscript of nature, the only scripture which can enlighten the reader.'
Most people consider as sacred scriptures only certain books or scrolls written by the hand of man, and carefully preserved as holy, to be handed down to posterity as divine revelation. Men have fought and disputed over the authenticity of these books, have refused to accept any other book of similar character, and, clinging thus to the book and losing the sense of it, have formed diverse sects. The Sufi has in all ages respected all such books, and has traced in the Vedanta, Zend-Avesta, Kabbala, Bible, Quran, and all other sacred scriptures, the same truth which he reads in the incorruptible manuscript of nature, the only Holy Book, the perfect and living model that teaches the inner law of life: all scriptures before nature's manuscript are as little pools of water before the ocean.
To the eye of the seer every leaf of the tree is a page of the holy book that contains divine revelation, and he is inspired every moment of his life by constantly reading and understanding the holy script of nature.
When man writes, he inscribes characters upon rock, leaf, paper, wood, or steel. When God writes, the characters He writes are living creatures.
It is when the eye of the soul is opened and the sight is keen that the Sufi can read the divine law in the manuscript of nature; and that which the teachers of humanity have taught to their followers was derived by them from the same source. They expressed what little it is possible to express in words, and so they preserved the inner truth when they themselves were no longer there to reveal it.