"There comes a time, Vasettha, when, after the lapse of a long, long period, this world died. And when this happens, beings have mostly been reborn into the Realm of Radiance [as devas]; and there they dwell, made of mind, feeding on rapture, self-luminous, traversing the air, continuing in glory; and thus they remain for a long, long period of time. There comes also a time, Vasettha, when sooner or later this world begins to re-evolve. When this happens, beings who had deceased from the World of Radiance usually come to life as humans...now at that time, all had become one world of water, dark, and of darkness that maketh blind. No moon nor sun appeared, no stars were seen, nor constellations, neither was night manifest nor day, neither months nor half-months, neither years nor seasons, neither female nor male. Beings were reckoned just as beings only. And to those beings, Vasettha, sooner or later after a long time, earth with its savours was spread out in the waters, even as a scum forms on the surface of boiled milky rice that is cooling, so did the earth appear."
This extract from the sutta is sometimes taken to show that the Buddha was teaching the evolution of life on earth, I however have difficulty in this interpretation as the Buddha wouldnt take up a metaphysical view point about things such as origin of life etc, but I cannot come to another conclusion as to what the buddha meant by this teaching.
Whats is everone else's interpretation of this sutta?