Good fortune and misfortune take effect through perseverance. The tao of heaven and earth becomes visible through perseverance. The tao of sun and moon becomes bright through perseverance. All movements under heaven become uniform through perseverance.
Perseverance is here elevated to a cosmological principle: it is the temporal medium through which the Tao itself becomes manifest and through which fortune accumulates into determinable form.
, The I Ching or Book of Changes, 1950thesis