i wouldnt say i completetly understood that but that specfic brahma of the highest 1 st jhana has a life span of exactly 1 aeon(buddhist world age) expecialy when the world age ends and everything retracts back into the second jhana plane it becomes apparent there being no end to the cycle there also was a mention of him attaining sotappana after the buddha visited him but i cant remember where i read that so a confirmation or not would be helpful.thank you very much for you answer.
A Quest to Recover Buddha's True Teachings