It seems odd to look at achievement through this lens, not as the thing the newspapers tell us it is, but – very often – as a species of mental illness. Those who put up the skyscrapers, write the bestselling books, perform on stage, or make partner may, in fact, be the unwell ones. Whereas the characters who – without agony – can bear an ordinary... See more

In fact, most of these comrades who I gauged to be more brilliant than I have gone on to become distinguished mathematicians. Still, from the perspective of 30 or 35 years, I can state that their imprint upon the mathematics of our time has not been very profound. They’ve all done things, often beautiful things, in a context that was already set

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