Most quotes come to us secondhand. This one we can hold in our hands — or at least, someone can, having paid over a million and a half dollars for the privilege. It's one of the rare famous quotes with an airtight, and frankly wonderful, origin story.

In November 1922, Albert Einstein was travelling in Japan for a lecture tour when word reached him that he'd been awarded the Nobel Prize in Physics. He was staying at the Imperial Hotel in Tokyo when a courier arrived at his room with a delivery. Einstein wanted to tip him — but, famously distracted or simply short of cash, he had no coins to give. So instead he took a piece of hotel stationery and wrote down, in German, a sentence of advice, telling the young man to hold onto it, as it might one day be worth more than a normal tip.

He was, it turned out, extraordinarily right about the note's value. And the deeper irony is delicious: the advice itself is a warning against chasing exactly the kind of success and fortune the note went on to fetch. Einstein — arguably the most celebrated scientist alive at that moment, mobbed by crowds wherever he went in Japan — was quietly telling a stranger that the calm, modest life is the happier one.

It's worth taking seriously precisely because of who wrote it. This isn't someone who failed at ambition consoling himself; it's a man at the absolute summit of worldly success gently suggesting that the summit isn't where happiness lives. Einstein sets "calm and modest" against "constant restlessness," and it's the restlessness he's really warning about — the treadmill of always needing the next achievement, where success and peace of mind pull in opposite directions. A quiet life with room to think, he suggests, is the richer bargain. Given how the story ended, it's hard to think of anyone better placed to know.

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