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...We
go out our daily lives understanding almost nothing of the world. We give
little thoughts to the machinery that generates the sunlight that makes
life possible , to the gravity that glues us to an earth that would otherwise
send us spinning off into space, or to the atoms of which we are made
and we fundamentally depend. Except for children, few of us spend much
time wondering why nature is the way it is; where the cosmos came from,
or whether it was always here; or whether there are ultimate limits to
what humans can know ...
from
the introduction of
"A
BRIEF HISTORY OF TIME”
CARL SAGAN
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