History proves beyond any possibility of doubt that no religion has ever given a stimulus to scientific progress comparable to that of Islam. The encouragement which learning and scientific research received from Islamic theology resulted in the splendid cultural achievements in the days of the Umayyads and Abbasids and the Arab rule in Sicily and Spain. I do not mention this in order that we might boast of those glorious memories at a time when the Islamic world has forsaken its own traditions and reverted to spiritual blindness and intellectual poverty. We have no right, in our present misery, to boast of past glories. But we must realize that it was the negligence of the Muslims and not any deficiency in the teachings of Islam that caused our present decay.
“History proves beyond any possibility of doubt that no religion has ever given a stimulus to scientific progress comparable to that of Islam. The encouragement which learning and scientific research received from Islamic theology resulted in the splendid cultural achievements in the days of the Umayyads and Abbasids and the Arab rule in Sicily and Spain. I do not mention this in order that we might boast of those glorious memories at a time when the Islamic world has forsaken its own traditions and reverted to spiritual blindness and intellectual poverty. We have no right, in our present misery, to boast of past glories. But we must realize that it was the negligence of the Muslims and not any deficiency in the teachings of Islam that caused our present decay.”
— Muhammad Asad · Science