If knowledge comes from the impressions made upon us by natural objects, it is impossible to procure knowledge without the use of objects which impress the mind.
 John Dewey, Democracy and Education (1916). copy citation

add
Author John Dewey
Source Democracy and Education
Topic impression impressing
Date 1916
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/852/852-h/852-h.htm

Context

“Thus Helvetius, perhaps the most extreme and consistent sensationalist, proclaimed that education could do anything—that it was omnipotent. Within the sphere of school instruction, empiricism found its directly beneficial office in protesting against mere book learning. If knowledge comes from the impressions made upon us by natural objects, it is impossible to procure knowledge without the use of objects which impress the mind. Words, all kinds of linguistic symbols, in the lack of prior presentations of objects with which they may be associated, convey nothing but sensations of their own shape and color—certainly not a very instructive kind of knowledge.” source