When we see what looks like our best friend approaching us, we shall have no reason to suppose that his body is not inhabited by the mind of our worst enemy or of some total stranger.
 Bertrand Russell, The Problems of Philosophy (1912). copy citation

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Author Bertrand Russell
Source The Problems of Philosophy
Topic reason body
Date 1912
Language English
Reference
Note
Weblink http://www.gutenberg.org/files/5827/5827-h/5827-h.htm

Context

“If the principle is unsound, we have no reason to expect the sun to rise to-morrow, to expect bread to be more nourishing than a stone, or to expect that if we throw ourselves off the roof we shall fall. When we see what looks like our best friend approaching us, we shall have no reason to suppose that his body is not inhabited by the mind of our worst enemy or of some total stranger. All our conduct is based upon associations which have worked in the past, and which we therefore regard as likely to work in the future; and this likelihood is dependent for its validity upon the inductive principle.” source