On the contrary, it is exhilarating: here we are, with the immensely difficult task before us of getting to know the beautiful world we live in, and ourselves; and fallible though we are we nevertheless find that our powers of understanding, surprisingly, are almost adequate for the task—more so than we ever dreamt in our wildest dreams. We really do learn from our mistakes, by trial and error. And at the same time we learn how little we know—as when, in climbing a mountain; every step upwards opens some new vista into the unknown, and new worlds unfold themselves of whose existence we knew
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