They describe how he was troubled by witnessing such things and...
They describe how he was troubled by witnessing such things and, sometimes when overcome by the pain of such sights, he would withdraw from men and pass days alone in the cave in the Tihamah mountains; he would marvel at the sky and its shining stars, the earth, the mountains, the sea, the desert and all the precious means placed at the disposal of man by the Creator; he would be grieved at the bad behavior and ignorance of those around him, who had thrown away a life of well-being and happiness for a tormented succession of bestial habits.
This feeling was always present with the Prophet; he bore this pain and vexation up to his fourtieth year when, according to these contemporary non-Muslim writers, he formed a plan to save his fellow-men from their miserable state of nomadic wandering, rebellious independence, selfish- ness and lawlessness. This plan, called the religion of Islam, was the most suitable one for the times.
The Prophet being of pure and sincere character, realized that his chaste thoughts were the Word of God and Divine Revelation which were infused in him through his virtuous nature. His good will and benevolent spirit, from which his thoughts exuded and established peace in his heart, was called the Spirit of Trustworthiness and Gabriel, the angel of revelation.
Furthermore, according to this contemporary view of Muhammad, he perceived the forces of good and happiness in nature as Angels and all the forces of bad as Satan and the Jinn (invisible entities). He called his own task, which he had undertaken according to his own conscience, Prophethood and himself, the deliverer of the divine message.
This explanation, however, comes from those writers who affirm the existence of God or at least some kind of nature- force, and attach a certain importance to the religion of Islam, albeit in the name of just and unbiased assessment. Those, however, who deny outright the existence of a Creator see Prophecy, revelation, divine duties, reward and punishment, the fire and the garden as mere religious politics, a lie in the name of religion to further one's own ends.
They say that the prophets were reformers who brought about social change in the name of religion. They argued that since men of past ages were drowned in ignorance and superstitious worship the prophets contained the religious order within a framework of superstitious beliefs about the origin of Creation and the day of reckoning in order to further their prospects of reform.