In the ninth century, when Saracen rivalry had stung the Byzantines into some partial revival of culture and science, [1204] the all-learned Patriarch Photius (c. 820-891), who reluctantly accepted ecclesiastical office, earned a dangerous repute for freethinking by declaring from the pulpit that earthquakes were produced by earthly causes and not by divine wrath. [1205] But this was an almost solitary gleam of reason in a generation wholly given up to furious strife over the worship of images, and Photius was one of the image-worshippers. The battle swung from extreme to extreme. The emperor Michael II, "the Stammerer" (820-828), held a medium position, and accordingly acquired the repute of a freethinker. A general under Leo V, "the Armenian," he had conspired against him, and when on the verge of execution had been raised to the throne in place of Leo, who was assassinated at the altar. The new emperor aimed above all things at peace and quietness; but his methods were thoroughly Byzantine, and included the castration of the four sons of Leo. Michael himself is said to have doubted the future resurrection of men, to have maintained that Judas was saved, and to have doubted the existence of Satan because he is not named in the Pentateuch [1206]--a species of freethinking not far removed from that of the Iconoclasts, whose grounds were merely Biblical. A generation later came Michael IV, "the Sot," bred a wastrel under the guardianship of his mother, Theodora (who in 842 restored image-worship and persecuted the Paulicians), and her brother Bardas, who ultimately put her in a convent. Michael, repeatedly defeated by the Saracens, long held his own at home. Taking into favour Basil, who married his (Michael's) mistress, he murdered Bardas, and a year later (867) was about to murder Basil in turn, when the latter anticipated him, murdered the emperor, and assumed the purple. It was under Basil, who put down the Iconoclasts, that Photius, after formally deposing and being deposed by the Pope of Rome (864-66) was really deposed and banished (868), to be restored to favour and office ten years later. In 886, on the death of Basil, he was again deposed, dying about 891. In that kaleidoscope of plot and faction, fanaticism and crime, there is small trace of sane thinking. Michael IV, in his disreputable way, was something of a freethinker, and could even with impunity burlesque the religious processions of the clergy, [1207] the orthodox populace joining in the laugh; but there was no such culture at Constantinople as could develop a sober rationalism, or sustain it against the clergy if it showed its head. Intelligence in general could not rise above the plane of the wrangle over images. While the struggle lasted, it was marked by all the ferocity that belonged from the outset to Christian strifes; and in the end, as usual, the more irrational bias triumphed.