Maybe I'm old-fashioned, but I think that there is plenty of room for a small number of forums where the people who are very doubtful about the way t… - Graham Farmelo

‘The greatest living theoretical physicist’ – many commentators in the past few decades have described Steven Weinberg in such terms. When I rather cheekily asked him what he thought of that statement, he shot back: ‘It is quite ridiculous to rank scientists like that’, adding with a twinkle in his eye, ‘but it would be impolite to dispute the conclusion’. That reply was classic Weinberg: self-aware, intimidatingly direct but always ready to lighten the moment with humour.

A physicist friend of mine once had a terrible spate of misfortune. Her flat was burgled, her cat was run over, and her grandfather died, all in the same week. Needing a bit of TLC, she went to see her professor, who offered three words of advice: “Do some physics.” For most people who are in need of consolation, I suspect physics is among the last things they would consider. , a former science editor, wants to persuade them that the branch of science so many people find soulless and intimating can offer much spiritual balm. He makes his case in what he calls a “love letter to physics”.
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For me, the main joy of physics is that it puts human beings so firmly in our place. Even if all of us – and every other living thing – died tomorrow, every quantum in the universe would carry on obliviously, doing its eternal, orderly dance to fundamental laws that we shall probably never discover. If you’re not a scientist, that thought may not be very consoling. But I’m just happy to keep on doing some physics.

As every physicist knows, Dirac was, in the words of Niels Bohr, "the strangest man of quantum mechanics" — someone deeply private, of very, very few words, rectilinear in thinking, virtually, apparently devoid of empathy with other human beings, always an outsider.