There are natural cycles, which involve energy. In fact everything operates on energy, and energy uses cycles, so everything is connected to "raising" and "falling" (the way a "linear" mind understands it). But within these cycles we have an ability to improve its impact on as, and thus get higher on the levels of "waxing / waning" cycles.

The moon has definitely strong influence on the Earth and all living here (monthly cycle). The same is for the Sun in its daily and yearly cycle. The ancient people knew this very well, as they didn't ignore observing the nature in the most direct, empirical ways.

Besides of planets, weather and cycles connected to them, I noticed also strong influence of individual cycles, like biorythms. Their official names may be confusing, though. So I think it's most beneficial to just check and observe their working on one from direct experience.