We make progress in thinking about a new idea according to the kinds of analogies we have available to us: what we can compare it with that is already familiar. We use analogies all the time. It is an ancient practice. Plato’s approach to problems in philosophy was to argue by analogies. His most famous is of the citizens who are in a cave and only see shadows on the wall. What will they make of the person who goes out into the light and comes back to tell them of the wonders he has seen in the real world out there? Of course, they will reject him as deluded.
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