In chs. 15-19 is traced the course along which the soul proceeds on its way from death to Judgment. The several stages of this journey are made to correspond with the seven Heavens through which the soul would naturally have to pass, each of those stages being attended with some kind of punishment or suffering, which causes intense pain to the wicked, while the good pass through it unharmed. The theory of the Purgatorial fires, founded on 2 Peter iii. 7-13,[169] was held by the early fathers, though, at first, without defining the place or manner in which the purgation was effected. St. Augustine was the first to establish Purgatory in the intermediate state, and the doctrine was further developed by St. Gregory. The early fathers held that the good and bad alike must pass through this stage, and herein our author agrees with them; his theory, moreover, whencesoever derived, agrees closely with that held by certain of the Jewish Rabbis, who held that all, good and bad alike, must pass through the seven lodges of _Hell_--at least as appropriate a term as that of the seven _Heavens_, which our author applies to them, though the latter is better suited to cosmological requirements--with the concomitants of fire, scourging, hail-showers, the extremes of heat and cold, etc., through all of which the righteous passed unharmed;[170] all of which is reproduced in the present work. It is remarkable how little advance upon the early Chaldæan myth of the Otherworld is displayed by this part of the subject, so far as regards the machinery or material framework, so to speak, although, of course, the ideas of sin and redemption which lie at the root of the Jewish and Christian doctrines alike, constitute a fundamental difference between the two stages of thought. The resemblance between the Irish and Chaldæan narratives extends even to the porter who sat at each of the seven doors of the Chaldæan Hades, where the passenger had to leave some part of his earthly raiment; in the _Fis_ his counterpart exists in the person of the angel who sits at the gate of each of the seven Heavens,[171] and chastises the souls as they enter. The second of these Heavens is the only one which appears to be endowed with distinctly purgatorial functions: here the angel Abersetus ‘purges the souls of the righteous, and washes them in the [fiery river], according to the amount of guilt that cleaves to them.’ Such, in substance, had been the teaching of the Church for some ages prior to Adamnán’s day, and such, too, the teaching of some of the Rabbinical Schools--that of Shammai, for instance, which held that those in whom good and evil were mingled were cleansed by purgatorial pains; in like manner, the author of the Book of Enoch describes a fire wherein they who are capable of redemption are cleansed of their carnal lusts.[172]