Thinking means connecting things, and stops if they cannot be connected.
 G. K. Chesterton, Orthodoxy (1908). copy citation

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

Context

“therefore I cannot think." Then there is the opposite attack on thought: that urged by Mr. H.G.Wells when he insists that every separate thing is "unique," and there are no categories at all. This also is merely destructive. Thinking means connecting things, and stops if they cannot be connected. It need hardly be said that this scepticism forbidding thought necessarily forbids speech; a man cannot open his mouth without contradicting it. Thus when Mr. Wells says (as he did somewhere) , "All chairs are quite different,"” source