Lecture VI
Consider the human being in this position, with his spinal column above, lying horizontal, and joined on to it on one side the head and on the other side the feet. You have there before you two appendages, as you had previously in the arms. You can regard the head as one arm and the two feet together as the other arm. At first hearing, it sounds very strange: but when you reflect that in the lower animal kingdom forms occur which are not very different from what I have described, the idea will perhaps not strike you as so grotesque, after all.
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