Regarding verse 17 of this chapter (8): “An age of Brahmā is a maha yuga, Great Age. There are four ages within a Great Age, which, when added together, amount to 4,320,000 of our years. There are one thousand of these Great Ages in one day of Brahmā, and the same for one night.”
It is my thinking that this huge timeframe of 4,320,000 of our years represents the length of time each of us spends coming and going through rebirths into Brahmā’s worlds. In other words, that’s how long it takes to get off the merry-go-round if we do nothing to speed up the process and just go on living ‘normal’ lives.
The four ages within each Great Age define the nature of our circumstances in these incarnations. Of the four ages, there is only one in which beings live harmoniously and are relatively ‘happy’. I don’t know about you, but I would rather go for the gold ring now.