“But has man's political skill marched hand-in-hand with his technical and scientific skill? Man can chain lightning to his command-can be control the society in which be lives? The answer is No! The political skill of man has been far outstripped by technical skill, and what lie has made he cannot be sure of controlling.”

Source: Labour Defended against the Claims of Capital (1825), p. 66

Sourced to the book, The Ascent of Man (1973), BBC Books: London, Chapter 13: The Long Childhood, p. 330.
The Ascent of Man (1973)
Context: We are all afraid - for our confidence, for the future, for the world. That is the nature of the human imagination. Yet every man, every civilization, has gone forward because of its engagement with what it has set itself to do. The personal commitment of a man to his skill, the intellectual commitment and the emotional commitment working together as one, has made the Ascent of Man.

Source: Drenai series, The King Beyond the Gate, Ch. 13

Rubinstein remarking on a performance by Maurizio Pollini — reported in Joanne Sheehy Hoover (March 13, 1981) "Captain Of the Keyboard", The Washington Post, p. C1.
Attributed

II, i, 46.
Elegies

Quote from his writings Thoughts on Art, Caspar David Friedrich; as cited in Letters of the great artists – from Blake to Pollock, Richard Friedenthal, Thames and Hudson, London, 1963, p. 32
undated

The Problem with Programming (Interview with Bjarne Stroustrup), MIT Technology Review, November 28, 2006, Jason Pontin, 2007-11-15 http://technologyreview.com/Infotech/17831/page3/,

Source: The Social Problems of an Industrial Civilisation, 1945, p. 30 (in 2014 edition); Cited in: Urwick & Brech (1949, 215)

Steps to Christ, p. 49