Source: Learning Strategies and Individual Competence (1972), p. 221 as cited in: Nigel Ford (2000) " Cognitive Styles and Virtual Environments http://docis.info/docis/lib/tian/rclis/dbl/jamsis/(2000)51%253A6%253C543%253ACSAVE%253E/advertising.utexas.edu%252Fvcbg%252Fhome%252FFord00.pdf" in: Journal of the American Society for Information Science. Vol 51, Is. 6, p. 543–557.
“I learned to play fast without agonizing about strategy or overanalyzing individual moves”
After he started playing “blitz” (the shortest format of Chess) in Chennai in early years, pages=292-293
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Viswanathan Anand 25
Indian chess player 1969Related quotes

Go Rin No Sho (1645), The Wind Book

“Learning is not child's play; we cannot learn without pain.”
Source: Conversation, Cognition and Learning (1975), p. 261 as cited in: K.V. Wilson (2011) From Associations to Structure. p. 200.

Quoted in "The Military Quotation Book" (2002) by James Charlton, p. 83
Disputed

Probably apocryphal. This quotation does not appear in any print translation of Sun Tzu. The first citation in Google Books is from 2002; no citation in Google Books occurs in a translation of Sun Tzu.
Misattributed
“A [learning] style is a disposition to adopt one class of learning strategy.”
Source: Learning Strategies, Teaching Strategies, and Conceptual or Learning Style (1988), p. 85.