Until a short time ago I had practically given up the idea of publishing them during my lifetime. But the idea was revived in me, perhaps chiefly, by the fact that I found that the results of my work, which I had passed on in lectures and discussions, were circulating, frequently misunderstood, more or less watered down or mutilated. By this my vanity was stung and it threatened
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to pester me again and again if I did not settle the matter, at least for myself, by publishing. And this seemed the most desirable thing from other points of view as well.