The year of Kindi’s death is as little known as that of his birth. He appears thus to have been out of court-favour when he died, or at least to have been in a subordinate position. It is strange that Masudi (v. II, 4 § 4), who had a great regard for him, is utterly silent on this point; but it seems in the highest degree probable from one of his astrological treatises that he was still alive subsequent to the year 870. The expiry of some petty astronomical cycle was imminent at that date, and this was being utilized by the Karmatites for the overthrow of the reigning family. In this matter, however, Kindi was loyal enough to make out the prolongation, for about 450 years, of the State’s existence, menaced though it was by a planetary conjunction. His princely patron might well be satisfied; and history conformed to the time predicted, to within half-a-century. [16] 2. Kindi was a man of extraordinary erudition, a Polyhistor: he had absorbed the whole learning and culture of his time. But although he may have set down and communicated observations of his own as a geographer, a historian of civilization and a physician, he was in no respect a creative genius. His theological views bear a Mutazilite stamp. He wrote specially on Man’s power of action, and the time of its appearance, i.e. whether it was before the act or whether it was synchronous with the act. The righteousness and the unity of God he expressly emphasized. In opposition to the theory,—known at that time as Indian or Brahmanic,—that Reason is the sole and sufficient source of knowledge, he defended prophecy, while yet he sought to bring it into harmony with reason. His acquaintance with various systems of religion impelled him to compare them together, and he found as a common element in them all the belief that the world was the work of a First Cause, One and Eternal, for whom our knowledge furnishes us with no more precise designation. It is however the duty of the discerning to recognize this First Cause as divine; and God himself has shewn them the way thereto, and has sent them ambassadors to bear witness for him, who are instructed to promise everlasting bliss to the obedient, and to threaten corresponding punishment to those who do not obey.