The Discovery of Deep Time - Time's Arrow, Time's Cycle: Myth and Metaphor in the Discovery of Geological Time - page 19

compendium of information. Goethe also realized that some dichotomies
must interpenetrate, and not struggle to the death of one side, because each of
their opposite poles captures an essential property of any intelligible world.
He wrote of structural and functional biology (though we might as well read
time's arrow and time's cycle): "The more vitally these two functions of the
mind are related, like inhaling and exhaling, the better will be the outlook for
the sciences and their friends."