A scrawled message from Albert Einstein in which the noted physicist, who developed the theory of relativity, explains how to live a happy life has just sold at auction for $1.3 million.

The New York Post reports that the short note reads: “A calm and humble life will bring more happiness than the pursuit of success and the constant restlessness that comes with it.”

“The Nobel Prize winner’s musings were scrawled in German in 1922 on stationery from the Imperial Hotel in Tokyo, where he’d been staying,” The Post reports. “Einstein gave the piece of advice to a bellboy after he didn’t have cash for a tip, telling him that one day it ‘will probably be worth more than a regular tip.’”

While he was in Japan, Einstein reportedly learned that he had won the Nobel Prize in physics.

“Bidding at the Jerusalem auction began at $2,000 Tuesday and quickly escalated. It lasted about 25 minutes,” The Post reports.

Another note written by Einstein, which reads, “Where there’s a will there’s a way,” sold for more than $200,000.