Probably the most daunting task that we face, as partly rational animals with adrenal glands that are too big and prefrontal lobes that are too small, is the contemplation of our own relative weight in the scheme of things. Our place in the cosmos is so unimaginably small that we cannot, with our miserly endowment of cranial matter, contemplate it for long at all. No less difficult is the realization that we may also be quite random as presences on earth. We may have learned about our modest position on the scale, about how to prolong our lives, cure ourselves of disease, learn to respect and
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