On November 4, 1915, just after completing his theory of general relativity he wrote a heartfelt letter to his eldest son, Hans Albert, who then was a naive 11-year-old boy who loved to play the piano.
This letter was published in the book Letters of great Americans to Their Children
My dear Albert,
Yesterday I received your dear letter and was very happy with it. I was already afraid you wouldn’t write to me at all anymore. You told me when I was in Zurich, that it is awkward for you when I come to Zurich. Therefore I think it is better if we get together in a different place, where nobody will interfere with our comfort. I will in any case urge that each year we spend a whole month together, so that you see that you have a father who is fond of you and who loves you. You can also learn many good and beautiful things from me, something another cannot as easily offer you. What I have achieved through such a lot of strenuous work shall not only be there for strangers but especially for my own boys. These days I have completed one of the most beautiful works of my life, when you are bigger, I will tell you about it.
I am very pleased that you find joy with the piano. This and carpentry are in my opinion for your age the best pursuits, better even than school. Because those are things which fit a young person such as you very well. Mainly play the things on the piano which please you, even if the teacher does not assign those. That is the way to learn the most, that when you are doing something with such enjoyment that you don’t notice that the time passes. I am sometimes so wrapped up in my work that I forget about the noon meal. . . .
Be with Tete kissed by your
Papa.
Regards to Mama.
The last sentence of the letter is by far the best piece of advice we’ve gotten from a scientist: “That is the way to learn the most… When you are doing something with such enjoyment that you don’t notice that the time passes.”
Thank you, Einstein
