How trite is the argument that this or that belief must be true because so many generations have believed it, so many countries, so many famous men,--as if error, like stolen property, gained a title from prescription of time! Scot pierced this pretension with a single sentence: "Truth must not be measured by time, for every old opinion is not sound." "My great adversaries," he says, "are young ignorance and old custom. For what folly soever tract of time hath fostered, it is so superstitiously pursued of some as though no error could be acquainted with custom." May we not say, indeed, that beliefs are rendered suspect by the very extent of their currency and acceptance? But Scot had a greater adversary than even young ignorance or old custom; and that was King James, who, whilst King of Scotland, wrote his _Demonologie_ against Scot's ideas (1597). James's mind was strictly Bible-bound, and for him the disbelief in witches savoured of Sadduceeism, or the denial of spirits. Yet Scot had taken care to guard himself, for he wrote: "I deny not that there are witches or images; but I detest the idolatrous opinions conceived of them." Nor can James have carefully read Scot, for tacked on to the _Discoverie_ is a _Discourse of Devils and Spirits_, which to the simplest Sadducee would have been the veriest trash. Scot, for instance, says of the devil that "God created him purposely to destroy. I take his substance to be such as no man can by learning define, nor by wisdom search out"; a conclusion surely as wise as the theology is curious. Anyhow it is the very reverse of Sadduceean. It is said that one of the first proceedings of James's reign was to have all the copies of Scot's book burnt that could be seized, and undoubtedly one of the first of his Acts of Parliament was the statute that made all the devices of witchcraft punishable with death, as felony, without benefit of clergy.