“He is really a tragic figure,” Lilienthal wrote in his diary, “with all his great attractiveness, brilliance of mind. As I left him he looked so sad: ‘I am ready to go anywhere and do anything [Oppie said], but I am bankrupt of further ideas. And I find that physics and the teaching of physics, which is my life, now seems irrelevant.’ It was this last that really wrung my heart.”
