The mystics of antiquity did not leave behind written sources. Their revelations were transmitted orally, from person to person, and written down by disciples. One of the first spiritual books written down by the master himself was Ko Xuan’s treatise “The Classics of Purity.” In the second part of the book, Osho continues to talk about the work of Ko Suan, full of ancient mysterious sutras. Ko Xuan's words are wise, incredibly beautiful, and only those who comprehend their meaning will be able to open their “Golden Gate” to the world of the divine. "If you want to understand Buddha, Lao Tzu, Ko Xuan, Kabir, Nanak, you must learn to read between the lines. You will have to throw away everything you know. All your beliefs, ideologies, philosophies. The master is exactly the opposite of all teachers" (Osho ).