On his first visit to the gym he saw a beautiful girl exercising on a machine while at the same time reading from a large book of philosophy that lay open on a stand in front of her, and he could hardly believe his own eyes. He discovered that all the machines in that gym had bookstands. This machine was called a step machine, and it simulated the action of walking upstairs: from then on he always used it, and always with a book open in front of him, for the image of that girl – who to his not inconsiderable disappointment he never saw again – had fixed itself in his head. Over the course of
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