1978 Turing Award Citation https://web.archive.org/web/20070708004814/http://awards.acm.org/citation.cfm?id=4173633&srt=all&aw=140&ao=AMTURING.
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“Overemphasis of efficiency leads to an unfortunate circularity in design: for reasons of efficiency early programming languages reflected the characteristics of the early computers, and each generation of computers reflects the needs of the programming languages of the preceding generation.”
§5.4
Notation as a Tool of Thought (1979)
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Kenneth E. Iverson 12
Canadian computer scientist 1920–2004Related quotes

the latter often in situations where the art of heuristic programming has far outreached the special-case "theories" so grimly taught and tested — and invocations about programming style almost sure to be outmoded before the student graduates.
Turing Award Lecture "Form and Content in Computer Science" (1969) http://web.media.mit.edu/~minsky/papers/TuringLecture/TuringLecture.html, in Journal of the Association for Computing Machinery 17 (2) (April 1970)
Source: Computer-Aided Design: A Statement of Objectives (1960), p. 2.

Quoted in the IBM employee magazine Think in 1979. Cited by his Associated Press obituary http://www.msnbc.msn.com/id/17704662/

“… greatest single programming language ever designed. (About the Lisp programming language.)”
2003. Daddy, Are We There Yet? A Discussion with Alan Kay http://www.openp2p.com/pub/a/p2p/2003/04/03/alan_kay.html
2000s

“Should the computer program the kid or should the kid program the computer?”
Spacewar http://wheels.org/spacewar/stone/rolling_stone.html ROLLING STONE · 7 DECEMBER 1972
Source: Software Engineering: Principles and Practice, 2007, p. 2