However, at an earlier date than that of the works just named, the subject had already formed the theme of writings professedly Christian in aim and origin. The spread of Christianity, which, of its very nature, kept men’s thoughts bent upon the contemplation of the future life, was naturally attended by an increased production of works descriptive of the other world and of man’s lot therein. No very great contributions to the subject are made by the Canonical Scriptures, which vouchsafe us but little direct information concerning the future life. St. Paul, indeed, relates how he was caught up to the third Heaven, and there ‘heard unspeakable words, which it is not lawful for a man to utter’;[84] but no intimation concerning his experiences there are given us, and although the passage quoted doubtless accounted for his subsequent inclusion among those to whom the next world had been revealed, all details of his vision are due to the legendary narratives referred to hereafter. St. Jude (Ep. v. 6) refers to the rebellious angels who are kept ‘in everlasting chains under darkness unto the judgment of the great day’; and St. Peter (II. iii. 7-12), speaks of a general purification by fire, but neither reveals anything concerning the state of man in the life to come. Even the Revelation of St. John, while standing far above the level of all other apocalyptic writings, as in other respects, so in the grandeur of conception and beauty of execution wherewith the author describes the celestial kingdom, would appear to have made but slight impression, save by an added richness of imagery, upon the subsequent course of the Vision legend. This, possibly, may be because the author treats his subject from the millennary point of view, taking for his theme rather the tribulations which were coming upon the world, and the establishment of a new heaven and a new earth in place of the old, than the condition of individual souls after death, or the places of their eternal abode. At the same time, he makes use of some of that Oriental imagery which had already obtained a place in the Hebrew writings, canonical and apocryphal alike, and thereby contributed to its naturalisation in the eschatological writings of the Church.[85]