Instead of a predetermined instinctive action, man has to weigh possible courses of action in his mind; he starts to think. He changes his role toward nature from that of purely passive adaptation to an active one: he produces. He invents tools and, while thus mastering nature, he separates himself from it more and more. He becomes dimly aware of himself—or rather of his group—as not being identical with nature. It dawns upon him that his is a tragic fate: to be part of nature, and yet to transcend it. He becomes aware of death as his ultimate fate even if he tries to deny it in manifold
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