This picture corresponds with the temperament which is alluded to as the "artistic," or "psychic" temperament, and allowing that in these days there is much posing and pretense, we still must admit that the quality known as "temperament" is a psychological study suggesting a stage of development hitherto unclassified. It is said also, that in his youth Mohammed was subject to attacks of catalepsy, evidencing an organism peculiarly "psychic." It is evident that Mohammed regarded himself as one having a mission upon earth, even before he had received the revelations which announced him as a prophet chosen of Allah, for he long brooded over the things of the spirit, and although he had not, up to his fortieth year, openly protested against the fetish worship of the Kureysh, yet he was regarded as one who had a different idea of worship from that of the men with whom he came in contact. Gradually, he became more and more inclined to solitude, and made frequent excursions into the hills, and in his solitary wanderings, he suffered agonies of doubt and self distrust, fearing lest he be self-deceived, and again, lest he be indeed called to become a prophet of God and fail in his mission. Here in a cave, the revelation came. Mohammed had spent nights and days in fasting and prayer beseeching God for some sign, some word that would settle his doubts and agonies of distrust and longing for an answer to life's riddle. It is related that suddenly during the watches of the night, Mohammed awoke to find his solitary cave filled with a great and wondrous light out of which issued a voice saying: "Cry, cry aloud." "What shall I cry?" he answers, and the voice answered: "Cry in the name of thy Lord who hath created; He hath created man from a clot of blood. Cry--and thy Lord is the most bountiful, who hath taught by the pen; He hath taught man that which he knew not."