The vitality of thought is in adventure. Ideas won't keep. Something must be done about them. When the idea is new, its custodians have fervor, live for it, and if need be, die for it.

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• Alfred North Whitehead:

  Common sense is genius in homespun.

• Alfred North Whitehead:

  But you can catch yourself entertaining habitually certain ideas and setting others aside; and that

• Alfred North Whitehead:

  An enormous part of our mature experience cannot not be expressed in words.

• Alfred North Whitehead:

  Familiar things happen, and mankind does not bother about them. It requires a very unusual mind to

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• Charles Babbage:

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• Charles Babbage:

  On two occasions I have been asked, 'Pray, Mr. Babbage, if you put into the machine wrong figures,

• Charles Babbage:

  A powerful attraction exists, therefore, to the promotion of a study and of duties of all others en