I thank you for your congratulations on my retirement. It makes me very happy. A professor has two functions: (1) to be learned and distribute bibliographical information; (2) to communicate truth. The 1st function is the essential one, officially considered. The 2nd is the only one I care for. Hitherto I have always felt like a humbug as a professor, for I am weak in the first requirement. Now I can live for the second with a free conscience.
He also said:
"It's the harness and the hours that are so galling! I expect to shed truths in dazzling profusion on the world for many years."