“The consequences of a plethora of half-digested theoretical knowledge are deplorable.”
1920s, The Aims of Education (1929)
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Alfred North Whitehead 112
English mathematician and philosopher 1861–1947Related quotes

“Contemplation is to knowledge, what digestion is to food – the way to get life out of it.”
Source: A Dictionary of Thoughts, 1891, p. 86.

A Preliminary Discourse on the Study of Natural Philosophy (1831)

At a fund-raiser in Manhattan, as quoted in "Hillary Clinton Calls Many Trump Backers ‘Deplorables,’ and G.O.P. Pounces" http://www.nytimes.com/2016/09/11/us/politics/hillary-clinton-basket-of-deplorables.html by Amy Chozick, The New York Times (10 September 2016)
Presidential campaign (April 12, 2015 – 2016)
Context: You know, to just be grossly generalistic, you could put half of Trump's supporters into what I call the basket of deplorables. Right? The racist, sexist, homophobic, xenophobic, Islamaphobic — you name it. And unfortunately there are people like that.

Source: Marcelo H. del Pilar, La Solidaridad II.65 (30 September 1891)
I say “we,” but if you’re a Bible-thumping fundamentalist I expect you at this point to take the book by one corner at arm’s length and ceremonially consign it to the place where you put most sensible ideas, along with everything else you decline to acknowledge the existence of, such as mainly shit.
context (5) “The Grand Manor”
Stand on Zanzibar (1968)
Source: 1950s, General Systems Theory - The Skeleton of Science, 1956, p. 201, quoted in: John P. Cole, Cuchlaine A. M. King (1969) Quantitative geography: techniques and theories in geography. p. 575