"Islam to this day has learned doctors, teachers and preachers; but it has no priests. It was full of the spirit of kindliness, generosity and brotherhood; it was a simple and understandable religion; it was instinct with the chivalrous sentiment of the desert; and it made its appeal straight to the commonest instincts in the composition of ordinary men. Against it were pitted Judaism, which had made a racial hoard of God; Christianity talking and preaching endlessly now of trinities, doctrines, and heresies no ordinary man could make head or tail of; and Mazdaism, the cult of the Zoroastrian Magi, who had inspired the crucifixion of Mani. The bulk of the people to whom the challenge of Islam came did not trouble very much whether Muhammad was lustful or not, or whether he had done some shifty and questionable things; what appealed to them was that this God, Allah, he preached, was by the test of the conscience in their hearts a God of righteousness, and that the honest acceptance of his doctrine and method opened the door wide in a world of uncertainty, treachery, and intolerable divisions to a great and increasing brotherhood of, trustworthy men on earth, and to a paradise not of perpetual exercises in praise and worship, in which saints, priests, and anointed kings were still to have the upper places, but of equal fellowship and simple and understandable delights such as their souls craved for."