P.S. I love what Buddha says towards the end of this Sutta:
Mendicants, who would ever think or believe that this earth and Sineru, king of mountains, will burn and crumble and be no more, except for one who has seen the truth?
From the perspective of Modern Astronomy, we know this is exactly what will happen to Earth and our solar system billions of years into the future when the Sun becomes a red giant. But for the people back then, there was no confirmation from modern science. So it was quite a significant statement from the Buddha that only the one that has put in the work to discover the truth for themselves can be fully sure about anything.
