Roger Bacon,
The Mirror of Alchimy
“ And hence it is, that there are so many bookes in the worlde of charmes, and characters, praiers, coniurations, sacrifices, and such like, that are meere Magicke: as the booke of the offices of Spirits, the book of the death of the Soule, the booke of Art notorie, and infinite more of the same kinde, that containe not in them the power of Art or Nature, but are wholy stuffed with the idle deuises of vaine magitians. ”
