It is a curious thing, but as one travels the world getting older and older, it appears that happiness is easier to get used to than despair. The second time you have a root beer float, for instance, your happiness at sipping the delicious concoction may be not quite as enormous as when you first had a root beer float, and the twelfth time your happiness may be still less enormous, until root beer floats begin to offer you very little happiness at all, because you have become used to the taste of vanilla ice cream and root beer mixed together. However, the second time you find a thumbtack in
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