It is always perilous to the mind to reckon up the mind.
 G. K. Chesterton, Orthodoxy (1908). copy citation

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

Context

“He was talking of a cynical man of the world, a sceptic, a diplomatist, a great practical politician. Such men are indeed to madness near allied. Their incessant calculation of their own brains and other people's brains is a dangerous trade. It is always perilous to the mind to reckon up the mind. A flippant person has asked why we say, "As mad as a hatter." A more flippant person might answer that a hatter is mad because he has to measure the human head. And if great reasoners are often maniacal, it is equally true that maniacs are commonly great reasoners.” source