Hence his soul burned to tell his countrymen his earnest belief in a supreme and personal God, to whom alone prayers should be made, and who alone could rescue by His almighty power. He pondered day and night on this single and simple truth. His perpetual meditations and ascetic habits induced dreams and ecstasies, such as marked primitive monks, and Loyala in his Manresan cave. He became a visionary man, but most intensely earnest, for his convictions were overwhelming. He fancied himself the ambassador of this God, as the ancient Jewish prophets were; that he was even greater than they, his mission being to remove idolatry,--to his mind the greatest evil under the sun, since it was the root of all vices and follies. Idolatry is either a defiance or a forgetfulness of God,--high treason to the majesty of Heaven, entailing the direst calamities. At last, one day, in his fortieth year, after he had been shut up a whole month in solitude, so that his soul was filled with ecstasy and enthusiasm, he declared to Cadijeh that the night before, while wrapped in his mantle, absorbed in reverie, a form of divine beauty, in a flood of light, appeared to him, and, in the name of the Almighty who created the heavens and the earth, thus spake: "O, Mohammed! of a truth thou art the Prophet of God, and I am his angel Gabriel." "This," says Carlyle, "is the soul of Islam. This is what Mohammed felt and now declared to be of infinite moment, that idols and formulas were nothing; that the jargon of argumentative Greek sects, the vague traditions of Jews, the stupid routine of Arab idolatry were a mockery and a delusion; that there is but one God; that we must let idols alone and look to Him. He alone is reality; He made us and sustains us. Our whole strength lies in submission to Him. The thing He sends us, be it death even, is good, is the best. We resign ourselves to Him." Such were the truths which Mohammed, with preternatural earnestness, now declared,--doctrines which would revolutionize Arabia. And why not? They are the same substantially which Moses declared, to those sensual and degraded slaves whom he led out of Egypt,--yea, the doctrines of David and of Job. "Though He slay me, yet will I trust in Him." What a grand and all-important truth it is to impress upon people sunk in forgetfulness and sensuality and pleasure-seeking and idle schemes of vanity and ambition, that there is a supreme Intelligence who overrules, and whose laws cannot be violated with impunity; from whom no one can escape, even though he "take the wings of the morning and fly to the uttermost parts of the sea." This is the one truth that Moses sought to plant in the minds of the Jews,--a truth always forgotten when there is slavery to epicurean pleasures or a false philosophy.