Sekha Person and Heaven

There are eight noble persons in the Theravada Buddhist Order. Among them, except arahatta-phalatthana person, seven persons called sekha have to practise higher virtue (adhisīla-sikkhā), higher mind (adhicitta-sikkhā), and higher wisdom (adhipaññā-sikkhā) to examine this earth of the body. They are able to examine even the world of Yama, the world of devas, etc. Arahatta-phalatthana person called asekha does not need to do it as he has already done it before.

"The Ariya Sekha shall
examine this earth (i.e., the body), the world of Yama (i.e. the four apayas)
and the world of man together with the world of devas. The Ariya Sekha shall
examine the well-taught Path of Virtue (Dhammapada) as an expert florist picks
and chooses flowers."