"Old age is a time of humiliations, the most disagreeable of which, for me, is that I cannot work long at sustained high pressure with no leaks in concentration."

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It's us that's really amazing. As far as I can see, our concentration of different abilities in one species - there's nothing I can see that in this Darwinian evolution that could've done that. So it seems to be a miracle of some sort.

— Freeman Dyson