Answer

In Jain Dharma, a “higher plane of existence” usually means Dev Gati — birth as a heavenly being. In English, people may call them “angels,” but Jainism does not use the exact same concept as Abrahamic religions.

Yes, heavenly beings can be reborn as humans after their heavenly lifespan ends, depending on their karma.

Explanation

Jainism teaches four main gatis, or states of rebirth:

• Dev Gati — heavenly beings
• Manushya Gati — human beings
• Tiryanch Gati — animals, plants, microorganisms, etc.
• Narak Gati — hellish beings

A soul born in Dev Gati experiences great pleasure, beauty, power, and long life. But it is still within saṃsāra, the cycle of birth and death.

So a heavenly being is not liberated. When its heavenly lifespan ends, it must take another birth according to karma.

Can they become human again?

Yes. A Dev soul can be reborn as a human if the appropriate karma rises.

In fact, Jain tradition teaches that human birth is spiritually more valuable than heavenly birth, because only human life provides the best opportunity for serious spiritual effort, right faith, right knowledge, right conduct, and liberation.

Spiritual Understanding

Heaven is not the final goal in Jain Dharma. It is pleasant, but temporary.

The final goal is Moksha — complete freedom from karma, rebirth, attachment, and suffering.

Takeaway

A “higher plane” in Jainism usually means heavenly birth, not permanent salvation. Heavenly beings can later be reborn as humans, and human birth is considered the most important opportunity for liberation.