Would you say that any one sacred book is superior to all others in the world?... I say the New Testament, after that, I should place the Koran, which in its moral teachings, is hardly more than a later edition of the New Testament. Then would follow according to my opinion the Old Testament, the Southern Buddhist Tripitaka, the Tao-te-king of Laotze, the Kings of Confucius, the Veda and the Avesta.
Letter to his son, published in The Life and Letters of Right Honorable Friedrich Max Müller (1902) edited by Georgina Müller, Vol. II, Ch. XXXII