We shape our tools and then our tools shape us.

Father John M. Culkin, Jr.
  • Culkin, John M. “A Schoolman’s Guide to Marshall McLuhan.” The Saturday Review, 18 Mar. 1967, p. 70
  • Commonly attributed to McLuhan, but written by Culkin, Most likely based on an idea originating from McLuhan. More here.
  • Marshall McLuhan (1911–1980), Wikipedia
  • John M. Culkin, Jr. (1928–1993), Wikipedia