"Islam "signifies resignation or submission to God ,and 'Musulman 'means 'subject'. Allah is the one God ,and it is therefore logical that all His servants should regard it as their duty to enforce obidance to Allah upon the believers.What they [the Arabs] proposed was not ,as many have thought,their conversion, but their subjection . And this subjection they went . After the conquest they asked nothing better than to appropriate the sience and art of the infidels as a part of their booty ; they would cultivate them to the glory of Allah. They would even adopt the institutions of the unbelieversin so far as these were useful to them "(Henri Pirenne,Mohammed and Charlemagne,tr.Bernard Miall [reprinted;New York : Meridian Books ,1961] pp.150-151)