John Maynard Keynes Quotes on Ideas
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Ideas shape the course of history.
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A study of the history of opinion is a necessary preliminary to the emancipation of the mind.
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The difficulty lies, not in the new ideas, but in escaping from the old ones, which ramify, for those brought up as most of us have been, into every corner of our minds.
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The ideas of economists and political philosophers, both when they are right and when they are wrong, are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men, who believe themselves to be quite exempt from any intellectual influence, are usually the slaves of some defunct economist. Madmen in authority, who hear voices in the air, are distilling their frenzy from some academic scribbler of a few years back.
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It is ideas, not vested interests, which are dangerous for good or evil.