From a simple assertion that he was presenting facts Glanvill went on to make a plea used often nowadays in another connection by defenders of miracles. If the ordinary mind, he said, could not understand "every thing done by Mathematics and Mechanical Artifice,"[9] how much more would even the most knowing of us fail to understand the power of witches. This proposition, the reader can see, was nothing more than a working out of one of the principles of his philosophy. There can be no doubt that he would have taken the same ground about miracles,[10] a position that must have alarmed many of his contemporaries. In spite of his emphasis of fact, Glanvill was as ready as any to enter into a theological disquisition. Into those rarefied regions of thought we shall not follow him. It will perhaps not be out of order, however, to note two or three points that were thoroughly typical of his reasoning. To the contention that, if a wicked spirit could work harm by the use of a witch, it should be able to do so without any intermediary and so to harass all of mankind all of the time, he answered that the designs of demons are levelled at the soul and can in consequence best be carried on in secret.[11] To the argument that when one considers the "vileness of men" one would expect that the evil spirits would practise their arts not on a few but on a great many, he replied that men are not liable to be troubled by them till they have forfeited the "tutelary care and oversight of the better spirits," and, furthermore, spirits find it difficult to assume such shapes as are necessary for "their Correspondencie with Witches." It is a hard thing for spirits "to force their thin and tenuious bodies into a visible consistence.... For, in this Action, their Bodies must needs be exceedingly compress'd."[12] To the objection that the belief in evil beings makes it plausible that the miracles of the Bible were wrought by the agency of devils,[13] he replied that the miracles of the Gospel are notoriously contrary to the tendency, aims, and interests of the kingdom of darkness.[14] The suggestion that witches would not renounce eternal happiness for short and trivial pleasures here,[15] he silenced by saying that "Mankind acts sometimes to prodigious degrees of brutishness." It is needless to go further in quoting his arguments. Doubtless both questions and answers seem quibbles to the present-day reader, but the force of Glanvill's replies from the point of view of his contemporaries must not be underestimated. He was indeed the first defender of witchcraft who in any reasoned manner tried to clear up the problems proposed by the opposition. His answers were without question the best that could be given.