Concentrate only on the achievements, and ignore the mistakes. When judging a mathematician you should only integrate f+ and ignore the negative part. Perhaps this should apply more generally to all evaluations of your fellow men.
A. Zygmund,
427
 
Mathematics and art are quite different. We could not publish so many papers that used, repeatedly, the same idea and still command the respect of our colleagues.
A. Zygmund,
426
 

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