On the "philosophy of ignorance"...................

It is our responsibility to leave the men of the future a free hand.  In the impetuous youth of humanity, we can make grave errors that can stunt our growth for a long time.  This we will do if we say we have the answers now, so young and ignorant;  if we suppress all discussion, all criticism, saying: 'This is it, boys, man is saved!' and thus doom man for a long time to the chains of authority, confined to the limits of our present imagination.  It has been done so many times before,
     It is our responsibility as scientists, knowing the great progress and great value of a satisfactory philosophy of ignorance, the great progress that is the fruit of freedom of thought, to proclaim the value of this freedom, to teach doubt is not to be feared but welcomed and discussed, and to demand this freedom as our duty to all coming generations."

-Richard Feynman, from his 1955 speech/essay, The Value of Science

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