eleventh century.(435) In invention, indeed, as well as in original research, the mediæval monasteries were singularly barren. They cultivated formal logic to great perfection. They produced many patient and laborious, though, for the most part, wholly uncritical scholars, and many philosophers who, having assumed their premises with unfaltering faith, reasoned from them with admirable subtlety; but they taught men to regard the sacrifice of secular learning as a noble thing; they impressed upon them a theory of the habitual government of the universe, which is absolutely untrue; and they diffused, wherever their influence extended, habits of credulity and intolerance that are the most deadly poisons to the human mind. It is, again, very frequently observed among the more philosophic eulogists of the mediæval period, that although the Catholic Church is a trammel and an obstacle to the progress of civilised nations, although it would be scarcely possible to exaggerate the misery her persecuting spirit caused, when the human mind had outstripped her teaching; yet there was a time when she was greatly in advance of the age, and the complete and absolute ascendancy she then exercised was intellectually eminently beneficial. That there is much truth in this view, I have myself repeatedly maintained. But when men proceed to isolate the former period, and to make it the theme of unqualified eulogy, they fall, I think, into a grave error. The evils that sprang from the later period of Catholic ascendancy were not an accident or a perversion, but a normal and necessary consequence of the previous despotism. The principles which were imposed on the mediæval world, and which were the conditions of so much of its distinctive excellence, were of such a nature that they claimed to be final, and could not possibly be discarded without a struggle and a convulsion. We must estimate the influence of these principles considered as a whole, and during the entire period of their operation. There are some poisons which, before they kill men, allay pain and diffuse a soothing sensation through the frame. We may recognise the hour of enjoyment they procure, but we must not separate it from the price at which it is purchased.