All sentient beings reside in these three realms of the universe. We exist in the realm of human beings. The deities exist in the realm of spiritual world and the suffering souls in the realm of the underworld which is Hell. The realms of spiritual world and underworld are intangible and invisible to us.
Human beings were born in the realm of spiritual world as deities because of their benevolent or righteous deeds while as humans on earth. They will exist for a certain period of time because they are not immortal yet. They are not fully enlightened beings and still have to travel in the cycle of birth and death just like us when their