In Buddhism, there are 3 planes of existences: sense-sphere existence, form-sphere existence, formless-sphere existence.
I am aware of the 31 planes of existence by Ven. Suvanno Mahathera. However, I am not convinced with the classification there. In the classification of that book, it seems to me that it tried to classify the planes from lowest to highest as it thinks they should be. Therefore:
- Sense-sphere existence (kama-loka): From hell → Devas Weilding Power Over the Creation of Others.
- Form-sphere existence (rupa-loka): From Retinue of Brahma → Peerless Devas.
- Formless-sphere existence(arupa-loka): From Sphere of infinite Space → Sphere of neither perception nor non perception.
The separation between the spheres are not very logical and clear cut to me, not saying about the cause of rebirth to that realm.
Example: In Realm#22 Mindless devas - Only body is present, no mind. Cause of rebirth: Fourth Jhana (?)
Since I am not aware of any other classification of the 3 planes of existences, if you have one, please share with me.
Here is my own classification of the 3 planes of existences.
If we think the 3 planes of existences contain all possible existences then it must also include non-sentient beings like rock, minerals…If we think the 3 planes of existences only contain sentient beings then we can exclude them.
Assume we will try to include all:
Sense-sphere existence (kama-loka): Here rupa is dense, so beings have heavy and fixed form. This existence is the existence of rocks, mineral, trees, vegetables, animals, human. These beings have fixed forms, dog have dog’ form, trees have tree’s form, human has human’s form. Moreover, it is not easy to change the form of them. A human cannot appear as a cat by his wish. The denser their rupa body has, the less sense they have. Therefore, human is the highest sentient being in this group.
Form-sphere existence (rupa-loka): Here rupa is less dense to the point that the form cannot be fixed like the form in the kama-loka existence. This existence is where the beings in kama-loka live after putting down their old heavy body. This is called fine-material existences. Beings have lighter and non-fixed form. This existence is the existence of what we called the spiritual world. These existences still have rupa. Therefore, this is the existences of beings in hell, ghosts, peta, demons, devas… In other words, the forms of these beings can be changed by their strong wishes, and the forms are not very stable. The higher level beings have less rupa than the lower ones. Therefore, their forms are less stable than the lower ones. These beings have more senses than in kama-loka since rupa is less dense.
Formless-sphere existence(arupa-loka): Here there is no rupa. Beings do not have a body or a form. They are their mind-bases since they still take the mind-base as “This is mine, This I am, This is myself.” They are invisible. These beings have the highest senses since they are not limited by rupa.
Of course, this is my new theory, but it is more logical to me. I understand it will be received with skeptical. Not saying it may be controversial. However, since I think it will help me better understanding bhava in DO, so I hope that there will be some experts can give me some comments. If you refer me to some books or teachers, please let me know what are the differences between mine and theirs, and what should I pay attention in their views?