William Godwin (March 3, 1756–April 7, 1836)
Words are of the utmost importance to human understanding. Almost all the ideas employed by us in matters of reasoning have been acquired by words. In our most retired contemplations we think for the most part in words; and upon recollection can in most cases easily tell in what language we have been thinking. Without words, uttered, or thought upon, we could not probably carry on any long train of deduction. The science of thinking therefore is little else than the science of words. He that has not been accustomed to refine upon words, and discriminate their shades of meaning, will think and reason after a very inaccurate and slovenly manner. He that is not able to call his idea by various names, borrowed from various languages, will scarcely be able to conceive his idea in a way precise, clear and unconfused.