In the Padma-Purāṇa also there is such references. It is said there,
- pradhāna-parama-vyomnor
- antare virajā nadī
- vedāṅga-sveda-janitais
- toyaiḥ prasrāvitā śubhā
- tasyāḥ pāre paravyoma
- tripād-bhūtaṁ sanātanam
- amṛtaṁ śāśvataṁ nityam
- anantaṁ paramaṁ padam
Now, there is material world, this material world is within the mahat-tattva compass. You have seen the picture, mahat-tattva compass. And that mahat-tattva is full with water. This is called Causal Ocean. And beyond that Causal Ocean, there is spiritual world. It is stated, tasyāḥ pāre paravyoma. Paravyoma means spiritual sky. And tripād-bhūtam. Tripād-bhūtaṁ sanātanam. Tripād-bhūtam means this material manifestation is only one-fourth energy of the Supreme Lord. This inferior energy is only one-fourth manifestation of the energy. The three-fourths manifestation of energy (is) in the spiritual world, and that is sanātanam. That is not subjected to creation and annihilation as this material world is subjected to that creation and annihilation. That is confirmed in Bhagavad-gītā. All Vedic literatures, they say the same thing. So we have to learn from authorized sources, and we can be informed perfectly about parāvara, para and avara. Avara means this inferior nature, and para means superior nature.