The man who begins to think without the proper first principles goes mad; he begins to think at the wrong end.
 G. K. Chesterton, Orthodoxy (1908). copy citation

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Author G. K. Chesterton
Source Orthodoxy
Topic wrong principles
Date 1908
Language English
Reference
Note
Weblink http://www.gutenberg.org/cache/epub/130/pg130-images.html

Context

“The eternity of the material fatalists, the eternity of the eastern pessimists, the eternity of the supercilious theosophists and higher scientists of to-day is, indeed, very well presented by a serpent eating his tail, a degraded animal who destroys even himself. This chapter is purely practical and is concerned with what actually is the chief mark and element of insanity; we may say in summary that it is reason used without root, reason in the void. The man who begins to think without the proper first principles goes mad; he begins to think at the wrong end. And for the rest of these pages we have to try and discover what is the right end. But we may ask in conclusion, if this be what drives men mad, what is it that keeps them sane? By the end of this book I hope to give a definite, some will think a far too definite, answer.” source