1 / 3   Two notes by physicist Albert Einstein sharing his theory on happiness in 1922 are set to go on sale at the Winner's auction house in Jerusalem on Tuesday. /China News Service Photo

2 / 3   According to reports, the scientist gave the messages to a courier who refused to take a tip while on a lecture tour in Japan. / China News Service Photo

3 / 3   The notes are written in German, with one saying “when there’s a will, there’s a way.” The other says “a quiet and modest life brings more joy than a pursuit of success bound with constant unrest.” /China News Service Photo