‘My friend, a man once hurt his leg. He had to walk with a crutch. This crutch was very useful to him, both for walking and for many other purposes. He taught all his family to use crutches, and they became a part of normal life. It was a part of everyone’s ambition to have a crutch. Some were made of ivory, others adorned with gold. Schools were opened to train people in their use, university chairs endowed to deal with the higher aspects of this science. A few, a very few people started to walk without crutches. This was considered scandalous, absurd. Besides, there were so many uses for
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