In Medina, Mohammed, who was a stranger, found it easier to proclaim himself a prophet than in his home city, where every one had known him as a simple camel-driver. Soon he was surrounded by an increasing number of followers, or Moslems, who accepted the Islam, "the submission to the will of God," which Mohammed praised as the highest of all virtues. For seven years he preached to the people of Medina. Then he believed himself strong enough to begin a campaign against his former neighbours who had dared to sneer at him and his Holy Mission in his old camel-driving days. At the head of an army of Medinese he marched across the desert. His followers took Mecca without great difficulty, and having slaughtered a number of the inhabitants, they found it quite easy to convince the others that Mohammed was really a great prophet. From that time on until the year of his death, Mohammed was fortunate in everything he undertook. There are two reasons for the success of Islam. In the first place, the creed which Mohammed taught to his followers was very simple. The disciples were told that they must love Allah, the Ruler of the World, the Merciful and Compassionate. They must honour and obey their parents. They were warned against dishonesty in dealing with their neighbours and were admonished to be humble and charitable, to the poor and to the sick. Finally they were ordered to abstain from strong drink and to be very frugal in what they ate. That was all. There were no priests, who acted as shepherds of their flocks and asked that they be supported at the common expense. The Mohammedan churches or mosques were merely large stone halls without benches or pictures, where the faithful could gather (if they felt so inclined) to read and discuss chapters from the Koran, the Holy Book. But the average Mohammedan carried his religion with him and never felt himself hemmed in by the restrictions and regulations of an established church. Five times a day he turned his face towards Mecca, the Holy City, and said a simple prayer. For the rest of the time he let Allah rule the world as he saw fit and accepted whatever fate brought him with patient resignation. Of course such an attitude towards life did not encourage the Faithful to go forth and invent electrical machinery or bother about railroads and steamship lines. But it gave every Mohammedan a certain amount of contentment. It bade him be at peace with himself and with the world in which he lived and that was a very good thing.