A young man had become possessed by a devil. The thing within him burst into loud lamentation and departed from the man. At once the youth's eye fell out on his cheek, and the whole of the pupil which had been black became white.
Saint AugustineAlthough among heretics and schismatics there is the same Baptism, nevertheless, the remission of sins is not operative among them because of the very rottenness of discord and wickedness of dissension ... Baptism was in them, but it did not profit them outside the Church ... Outside the Church, Baptism works death because of discord.
Saint Augustine