Found via Paul Kedrosky.
The distinguished quantum physicist, who worked with Einstein at Princeton, tells Charles Nevin three things he's learnt ...
Thank you very much for your friendly invitation. I am delighted to share with Her Majesty the distinction of hanging on longer than expected. Here are brief answers to your questions.
1. I continue working because I agree with Sigmund Freud’s definition of mental health. To be healthy means to love and to work. Both activities are good for the soul, and one of them also helps to pay for the groceries.
2. In my younger days my work as a scientist was deep and narrow. Now, as I grow old, my work grows broader and shallower. As a young man, I solved technical problems of interest only to a few specialists. As an old man, I write books about human affairs of interest to a broad public. In both halves of my life, I tried to make the best use of my limited abilities.
3. (a). Advice to people at the beginning of their careers: do not imagine that you have to know everything before you can do anything. My own best work was done when I was most ignorant. Grab every opportunity to take responsibility and do things for which you are unqualified.
(b). Advice to people at the middle of their careers: do not be afraid to switch careers and try something new. As my friend the physicist Leo Szilard said (number nine in his list of ten commandments): “Do your work for six years; but in the seventh, go into solitude or among strangers, so that the memory of your friends does not hinder you from being what you have become.”
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