We have to learn again that science without contact with experiments is an enterprise which is likely to go completely astray into imaginary conjecture.
Sometimes I don't even pull my shoes off for six weeks at a time, except, you know, just to take a shower. I just take breaks between 24 hours a day, just a break now and then, it don't take me long to rest; maybe 20 to30 minutes sometime, or maybe an hour.

