You know the Norse 9 realms perhaps. Yggdrasil, the world tree. But the idea of a world tree, cosmic tree, exists in many cultures/mythos. But what of the Vedic 14 realms? The Lokas.
Let's discuss.
As said, there are 14 worlds/realms 7 higher ones 7 lower ones.
Following?
7+7=14
We're not using Terrance Howard math here.
Okay. These are the Vedic lokas (because there is a more commonly accepted number in Hinduism - nuance moment: commonly accepted, doesn't mean it's believed in totality by everyone).
K, back to the 14 first.
The higher 7 lokas are said to be the heavens, inhabited by the gods and celestial beings more affiliated/closer to "truth" - in vedic and hindu terms, this is idea of divine truth, waking up to the realizations of the universe - maya (the grand illusion), think more awakened, fully formed, wise, have achieved some form of spiritual liberation from ego and the like). And to counter - the 7 lower are often thought of as "hells" - not exactly fire and brimstone but where you suffer the consequences of bad karma, having to live out/purify yourself.
In some iterations, yes, hellish beings to use that phrase, and demons (of a like) can occupy those lower lokas.
As mentioned earlier, in Hinduism, one of the most common take on the lokas is the: Trailokya.
Or three lokas, three spheres, planes of existence, three worlds, often considered: Earth (Bhuloka), Heaven (Svarga), Hell (Naraka), or - Earth (Bhuloka), Heaven (Svarga), and the Netherworld (Patala).
This is just a primer - because of the birth of Buddhism and it's spread, the idea of lokas spread as well to cultures that later adopted Buddhism. So there is a Tibetan Buddhist take on lokas, a Chinese Buddhist one, Vietnamese, and there is even a Jainism interpretation/belief on lokas.










