Do all these mistakes and changes of opinion take something away from our admiration of Albert Einstein? Not at all. If anything, the opposite is the case. They teach us something instead, I believe, about the nature of intelligence. Intelligence is not about stubborn adherence to your own opinions. It requires readiness to change and even discard those opinions. In order to understand the world, you need to have the courage to experiment with ideas and not fear failure, to constantly revise your opinions, so as to make them work better.
