It may not be impossible, but that our Faculties may be so construed, as always to deceive us in the things we judge most certain and assured.

Not himself a scientist he has been called "the most skillful apologist of the virtuosi" or in other words the leading propagandist for the approach of the English natural philosophers of the later 17th century. Joseph Glanvill (1636–1680) was an English writer philosopher and clergyman.