from personal experience knowledge of some glaring contrast between clerical profession and accomplishment. That some such contrast should at all times in greater or less degree exist is only the inevitable result of the weaknesses of human nature. It has invariably been the case, however, that when the ministers of a religion have failed to proclaim their gospel in their lives as well as in their preaching, they have sowed doubt and distrust and lost adherents. Bishop Grosseteste told Pope Innocent IV that the corruption of the priesthood was the source of the heresies which troubled the Church.[3] We may feel sure that it was _one_ source at all events when we note in the twelfth century a most marked revival of the Donatist doctrine that the sacrament is polluted in sinful hands. By similar reasoning the score of a great composer might be regarded as tainted for our hearing because the members of the orchestra performing it were not all high-minded men. That would be similar reasoning: but it would not be the same. Skill in his art is what we expect from the musician; without it he cannot mediate between the composer and his audience, he cannot interpret the music, he can only jar and lacerate the feelings of his hearers. There is the skill also of the priest. He has to interpret spiritual things and needs therefore to be spiritually-minded. God may not be dependent upon the worthiness of His interpreters; none the less their unworthiness may jar upon and lacerate the feelings of worshippers, conscious of the scandal of such unworthiness. When, for example, priests are found abusing the confessional by actually soliciting their female penitents to sin, a moral revulsion against such a practice is inevitable. Such a revulsion may in some cases generate an attack upon the whole system of confession—and that is heresy.[4] An intense dissatisfaction with the moral condition of the world, more especially as revealed in the Church, is one of the dominant features of the neo-Manichæan heresy, known as Catharism or Paulicinianism, of Waldensianism, of Joachitism. The last actually postulated that Christianity had failed and that mankind stood in need of a new revelation and a new Saviour. Corruption in the Church was, then, one of the contributory causes of mediæval heresy, and anti-sacerdotalism was one of its features.