I'm under the impresion that Samsara is the natural state of things in this Universe, every being just "recycles" itself on and on, at the laws of randomness and karma. Eventually, beings figured a way out, and by gaining such control and power, could now model and reshape the flow of Samsara, therefore creating a force of spiritual evolution (spinning the wheel). So the wheel of Dharma was arficial, but at such scale and ingrained in the very fabric of the Universe that it could pass as a force of nature. The only difference is that it must be "kept spinning" by illuminated beings.

Is my reading correct?