2932. It was also granted to tell them, by tacit speech, that there is never anything which man knows, for instance, how the muscles operate actions: when yet therein [ibi], as about everything else that pertains only to the body, there are indefinite things which we do not know; and that in the body alone are the most recondite things, pertaining to all the sciences, and yet they do not know their least, and nevertheless suppose unless they know, and so apprehend, or as they say, understand by the senses, how there are spiritual things, which [are] within that sphere, and where [there are] indefinites still, whereof we know nothing at all, [that there is no such spiritual principle]. What then could exist thence, but denial of all things, and thus a sort of cloudy principle [nebulosum] wherein was nothing into which they are as it were transformed, because they agreed with their ideas or phantasies. - 1748, August 26.