The chief function of the body is to carry the brain around.

Attributed to Edison in: Infinite Riches: Gems from a Lifetime of Reading (1979).

Also in: Who Goes There?: What and where is God? (F. H. Revell, 1958), p. 56.

Also in: The Spectator, Volume 242 (F.C. Westley, 1979), p. 28.

This quote may be apocryphal, as it hasn't been found in any of Edison's original works.