it's widely appreciated that human beings, in common with many other creatures of Earth, experience a natural oscillation of their bodily functions, a "biorhythm" with a period of approximately twenty-four hours—the circadian rhythm, named in 1959 (https://www.etymonline.com/word/circadian – the word is not of antique origin). the source of this oscillation is obvious enough; our bodies tend to follow the Sun.
what's less clear is whether the human animal will keep up such a 24-hour cycle without the obvious prompts furnished both by the Sun herself and by the rigors of life in a harsh and punitive society that's attuned itself to solar timekeeping. studies have been done on human beings in space and underground, and it seems that our bodies tend to vary a bit from the twenty-four-hour norm in the absence of usual cues about the (solar) time of day.
the obvious implication is that human beings in fact have some degree of control over their circadian rhythms. they can (if they have the power to do so) choose to align themselves according to the solar cycle; or, by exercising control over their own environment, they can drift from this cycle or follow a different one. it's not inevitable that we should be locked into a simple day-night cycle—but it's in the interests of a heavily regimented society to force the same circadian rhythm on everyone.
which brings us to the interesting possibility of aligning oneself with other natural oscillations, such as the cycles described by the Moon and planets. if following a solar cycle in fact requires some exercise of conscious decision—choosing to stick by a rigid 24-hour cycle, or varying from it—then choosing to align oneself to the Moon or some other celestial body isn't really that much different, surely. and such is the general premise of astrology.
but Western society tells us that one of these things is correct and the other is "irrational" and "illogical", with the excuse that the physical influence of the Moon and planets is surely insignificant and negligible and therefore safely ignored. is this actually true, though? let's just say that the current culture of the West does not openly encourage inquiry into the matter...though I suggest that such inquiries are being made anyway, because corporate entities aren't likely to ignore ANY tool that might enable them to predict the future.
~Chara of Pnictogen