really attaining the same perfection, except at least through the medium of the Holy Scriptures and the apostolic office, that is, the Church. The place of the holy Christendom that had the Spirit in its midst was taken by the ecclesiastic institution possessing the "instrument of divine literature" ("instrumentum divinae litteraturae") and the spiritual office. Finally, we must mention another factor that hastened the various changes; this was the theology of the Christian philosophers, which attained importance in the Church as soon as she based her claim on and satisfied her conscience with an objective possession. 3. But there was one rule which specially impeded the naturalisation of the Church in the world and the transformation of a communion of the saved into an institution for obtaining salvation, viz., the regulation that excluded gross sinners from Christian membership. Down to the beginning of the third century, in so far as the backslider did not atone for his guilt[225] by public confession before the authorities (see Ep. Lugd. in Euseb., H. E. V. 1 ff.), final exclusion from the Church was still the penalty of relapse into idolatry, adultery, whoredom, and murder; though at the same time the forgiveness of God in the next world was reserved for the fallen provided they remained penitent to the end. In _theory_ indeed this rule was not very old. For the oldest period possessed no theories; and in those days Christians frequently broke through what might have been counted as one by appealing to the Spirit, who, by special announcements--particularly by the mouth of martyrs and prophets--commanded or sanctioned the readmission of lapsed members of the community (see Hermas).[226] Still, the rule corresponded to the ancient notions that Christendom is a communion of saints, that there is no ceremony _invariably_ capable of replacing baptism, that is, possessing the same value, and that God alone can forgive sins. The practice must on the whole have agreed with this rule; but in the course of the latter half of the second century it became an established custom, in the case of a first relapse, to allow atonement to be made once for most sins and perhaps indeed for all, on condition of public confession.[227] For this, appeal was probably made to Hermas, who very likely owed his prestige to the service he here unwittingly rendered. We say "unwittingly," for he could scarcely have intended such an application of his precepts, though at bottom it was not directly opposed to his attitude. In point of fact, however, this practice introduced something closely approximating to a second baptism. Tertullian indeed (de paenit. 12) speaks unhesitatingly of _two_ planks of salvation.[228] Moreover, if we consider that in any particular case the decision as to the deadly nature of the sin in question was frequently attended with great difficulty, and certainly, as a rule, was not arrived at with rigorous exactness, we cannot fail to see that, in