Liberation (enlightenment) from the Wheel of Rebirth is said in general to be possible only from the Human Plane. It is the lowest world considered a "fortunate" destination.
The Human Plane is marked by questioning and curiosity. It is also a Realm of Passion (kama-loka, which includes lower celestial worlds and unfortunate subterranean destinations); human beings (Sanskrit, manushyas; Pali, manussa) want to strive, consume, acquire, enjoy, explore.
- Listen to discussion of unseen beings in the human world and ways to see them by Graham Hancock (WQ).
It is visited by other beings as well, for example, "angels" (catu maha rajika devas) and contacted by brahmas (divinities), harmed by maras ("killers") and meddled with by titans (asuras) and nagas (dragons) and gandhabbas (sprites) as well as hungry ghosts (petas) and a variety of spirits whose diversity accords with their karma.
Human Plane depicted in the Wheel of Life (Maren Yumi/Flickr, Creative Commons)