4 1 6 D O C U M E N T S 4 6 5 , 4 6 6 M A R C H 1 9 2 9 465. To Sigmund Freud [Düsseldorf,] 22 March 1929 Dear Master, Warm thanks for having thought of me. Why do you emphasize my luck? You, since you have slipped into the shoes of so many people, indeed of humanity in general, hardly had an opportunity to slip into mine! Respectfully yours, with best wishes, your A. Einstein 466. To Michele Besso [Berlin, after 22 March 1929] Hopelessly buried under an avalanche of paper, meanwhile sincere thanks from your Albert The lines you wrote show again that nothing in later life can equal youthful friendships. The theory of electricity based on teleparallelism is becoming increasingly beautiful. But whether it’s true, I still don’t know. We’ll soon find out.