"What you do and learn in life physically changes what your brain looks like—it literally rewires it."

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The pressure to make public retractions of past statements - there's something medieval about it. What does it mean, anyway, to 'retract' what you've said? How can anyone state categorically that a thought he once had is no longer valid? In modern times an idea can be refuted, yes, but not retracted.

— Milan Kundera