"Thou shalt not suffer a Witch to live," is a Command, and it was once considered as much to be regarded as any other Command in the Bible. That there were Witches in the World was as plain, and as much to be believed, as that there were Spirits of any Kind whatever. Whoever believed in the Immortality of the Soul, believed in the Immortality of bad Souls as well as good. Soul is another Word for Spirit; hence good Spirits and bad Spirits. Witches were bad Spirits, but whether they originated _in_ Mankind, or whether they were sent there to take Possession of the human Body, and to exclude a better Tenant, has not been satisfactorily settled by Psychologists and Metaphysicians. But one Thing seems to be well established, and that is, that quite as many bad Spirits find Habitations in the Sons and Daughters of these Days, as at any former Period. Fortunately it was found out, at length, that destroying the Tenement of a bad Spirit, did not destroy that Spirit. But this was not thought of until Thousands had been put to Death. It will doubtless be said by many, that if ever there were Witches in the World, there are Witches now. This Point it is not intended to argue. There were always those who denied the Existence of Witches; or, what amounted to the same Thing, they would never allow that there was sufficient Evidence produced to prove that _Craft_ against any who were accused of it. Persons who thus question all Court Proceedings, where Witchcraft was attempted to be detected, were regarded as unfit for good Society, and unworthy of its Protection. Those who were for "ridding the Land" of Witches, thought those who questioned the Legality of their Proceedings, were, at least, Infidels, in the most obnoxious Sense, and they were generally treated as such, and were to be shunned by Society. Thus it fared with MR. ROBERT CALEF, who, during the Prosecutions and Executions of the People accused in Massachusetts, as will be seen in the Progress of the present Work. It is scarcely conceivable by even the partially enlightened of the present Age, that only one hundred and fifty Years ago our Ancestors were, in some respects, so slightly removed from Barbarity and heathen Darkness. Superstition will give Way only to mental Culture; but there may be considerable mental Culture, and also much Superstition; for Persons may be educated in many Things when those very Things are founded in Error. Certain Premises are taken for granted, because no Data exist, or at least insufficient Data, to investigate them and the Foundations on which they rest. This is still the Case, but it was more so in Times past.