I have another question to ask.
Here in Myanmar, I heard some people trying to see the “arising and passing away”, and especially the argument that every rupa/ the whole world (I assume they mean the external, not the subjective world) is arising and passing away every 17 mind-moments. I read your posts and also listened to Wahareko Thero’s discourse where he stated that the usuaö pure octad should have a lifetime of 1 mahakappa (I hope it have the number right). It makes much more sense to me this way. Now I wanted to ask you if you have any scriptural proof that I could use to show to some people. Since in Ven. Bodhi’s book, it also refers to a commentary where this statement is “messed up”. In your post about this topic, you say, if I remember correctly, that it is not clearly mentioned in Abhidhamma.
You probably those above cited posts, but I just wanted to make sure.
Finally, certain suddhāṭṭhaka may have longer lifetimes. For example, the lifetimes of arupavacara Brahmas are MANY Maha Kappas. Thus, those suddhāṭṭhaka associated with their hadaya vatthu would have very long lifetimes.
– However, there is no rupa that will last forever. All sankhata have finite lifetimes.