The methods of theoretical physics should be applicable to all those branches of thought in which the essential features are expressible with numbers. ↗
About 1960, it became clear that it was best for me to bring the experimental part of my research program to a close - there was too much to do on the theoretical aspects - and I began the process of winding down the experiments. ↗
There is no theoretical study of motherhood. You know, before I became a mother, I did play a mother, but I was like - I was more thinking of my own mother. I was doing my mother. ↗