From My Modern Met:
He pulled out the hotel stationery and on one sheet of paper wrote his theory of happiness. “A calm and modest life,” Einstein penned, “brings more happiness than the pursuit of success combined with constant restlessness.” On the second sheet of paper, he wrote, “Where there’s a will there’s a way.”
Einstein told the courier to save those notes, as maybe they’ll be valuable in the future. It turns out that he was right. The papers were sold at a 2017 auction in Jerusalem, where the note on happiness fetched $1.56 million and the second message sold for $240,000.