Now things follow in two
ways—simultaneously or subsequently; for instance, knowledge is
subsequent to learning, but life is simultaneous with health. Things which
produce act in three ways; thus, healthiness produces health; and so does food;
and exercise as a rule.
Aristotle in 23 Volumes, Vol. 22, translated by J. H. Freese. Aristotle. Cambridge and London. Harvard University Press; William Heinemann Ltd. 1926.
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