We read of Marcus Brutes, (one that had his life given him by Julius Caesar, and was also his favorite, and notwithstanding murthered him,) how at Phillipi, the night before he gave battell to Augustus Caesar, he saw a fearfull apparition, which is commonly related by Historians as a Vision: but considering the circumstances, one may easily judge to have been but a short Dream.

For sitting in his tent, pensive and troubled with the horrour of his rash act, it was not hard for him, slumbering in the cold, to dream of that which most affrighted him; which feare, as by degrees it made him wake; so also it must needs make the Apparition by degrees to vanish: And having no assurance that he slept, he could have no cause to think it a Dream, or any thing but a Vision.

And this is no very rare Accident: for even they that be perfectly awake, if they be timorous, and supperstitious, possessed with fearfull tales, and alone in the dark, are subject to the like fancies, and believe they see spirits and dead mens Ghosts walking in Churchyards; whereas it is either their Fancy onely, or els the knavery of such persons, as make use of such superstitious feare, to pass disguised in the night, to places they would not be known to haunt.
From this ignorance of how to distinguish Dreams, and other strong Fancies, from vision and Sense, did arise the greatest part of the Religion of the Gentiles in time past, that worshipped Satyres, Fawnes, nymphs, and the like; and now adayes the opinion than rude people have of Fayries, Ghosts, and Goblins; and of the power of Witches.

For as for Witches, I think not that their witch craft is any reall power; but yet that they are justly punished, for the false beliefe they have, that they can do such mischiefe, joyned with their purpose to do it if they can; their trade being neerer to a new Religion, than to a Craft or Science.

And for Fayries, and walking Ghosts, the opinion of them has I think been on purpose, either taught, or not confuted, to keep in credit the use of Exorcisme, of Crosses, of holy Water, and other such inventions of Ghostly men.