Cyclical Catastrophes that follows the Precession of the Equinoxes

What if a cycle implies the beginning and end of an equal line put together? What if the natural line continues while the artificial cycle is being held together for as long as the temporary being holding it together has the power to do so? How could holding onto a temporary cycle, while a line continues be precise (neither more nor less than)? Doesn't it take more effort to hold onto temporarily, while the ongoing line lessens (inception towards death) ones efforts (life)?

Euqi (equal) nox (night)...what if only during equal light can opposite differences (night/day) be shaped?