So Caliban is Caliban, and we cannot do very much with him so long as his main belief and trust rests upon Setebos. The land cannot be brought back to those who cannot master the land. St Thomas Aquinas never erred worse, perhaps, than when, following his master Aristotle, he judged the ideal state to need a peasantry strong in the arm, dull of intellect, and divided among themselves by mutual distrust. His contemporary, Berthold of Regensburg, a friar like himself, but a friar who knew the poor well, did here advance one full step beyond Aquinas; he saw the social evil clearly, though he did not foresee the social remedy. He lamented (as we have seen) the lack of peasant saints; he was under no illusions as to the present state of these countryfolk who, on an average, formed half his congregation; but he did see that the root of their misery lay in their disunion. In one of his sermons, he compares different classes with different animals: