In 1915, Albert Einstein concluded his theory of general relativity. This masterpiece of two pages later gave him the status of international fame and the greatest prestige of all time. On November 4 of the same year, Hans Albert Einstein, his 11-year-old son from Einstein in Vienna, wrote
Dear Albert, I'm glad you got your sweet letter. I'm glad you enjoy piano very much, in my opinion it is for your old age and the carpenter's job is more loved than the leisure time, even more than the school. In Piano, the tunes are what you enjoy, even if your teacher does not say that. The work you enjoy so much that you do not have the time to pass the time-you will learn the most from this type of work. Occasionally I was so absorbed in work that I forgot to eat lunch. You can play the game with a tactic (a game of play), you will be more aggressive. Kiss you and your mother greet your mother
