"From a new angle and with a fresh vigour, Islam took up that systematic development of positive knowledge which the Greeks had begun and relinquished. If the Greek was the father, then the Arab was the foster-father of the scientific method of dealing with reality, that is to say, by absolute frankness, the utmost simplicity of statement and explanation, exact record and exhaustive criticism. Through the Arabs it was, and not by the Latin route, that the modem world received that gift of light and power."