CC Madhya 21.51
amṛtaṁ śāśvataṁ nityam
anantaṁ paramaṁ padam
tasyāḥ pāre — on the other bank of the Virajā River; para-vyoma — the spiritual sky; tri-pāt-bhūtam — existing as three fourths of the opulence of the Supreme Lord; sanātanam — eternal; amṛtam — without deterioration; śāśvatam — without being subjected to the control of time; nityam — constantly existing; anantam — unlimited; paramam — supreme; padam — abode.
“ ‘Beyond the river Virajā is the spiritual nature, which is indestructible, eternal, inexhaustible and unlimited. It is the supreme abode, consisting of three fourths of the Lord’s opulences. It is known as paravyoma, the spiritual sky.’
In the spiritual sky there is neither anxiety nor fear. It is eternally existing, and it consists of three fourths of the Lord’s energy. The material world is an exhibition of only one fourth of the Lord’s energy. Therefore it is called eka-pād-vibhūti.