Lord Krishna, is the master of the three worlds and the three principal demigods. All this Infinite, limitless material universe is manifested by one fourth of the powers of God. By the remaining three fourth spiritual worlds are manifested. No one can measure the length and breadth of the one fourth of Lord's energy manifested in the material world. Who then can measure the three fourths that is manifested in the spiritual world? Spiritual nature & spiritual worlds are indestructible, eternal, inexhaustible and unlimited. It is the Supreme abode of God, consisting of three fourths of the Lord's opulence & it is known as paravyoma, the spiritual sky. Although God is present in His Spiritual abode in higher spiritual worlds, He is yet all-pervading, and everything is situated within Him.
Below are few verses of Bhagwat Gita which describe about the material & spiritual spaces & worlds :
punar avartino ’rjuna
mam upetya tu kaunteya
punar janma na vidyate" (Bhagwat Gita: Chapter Eight verse 16)
"Sri Krishna said: From the highest planet in the material world down to the lowest, all are places of misery wherein repeated birth and death take place. But one who attains to My Supreme Supreme abode, O Arjuna, never takes birth again.
"paras tasmat tu bhavo ’nyo
’vyakto ’vyaktat sanatanah
yah sa sarveshu bhutesu
nasyatsu na vinasyati" (Bhagwat Gita: Chapter Eight verse 20)
"Sri Krishna said: Yet there is another unmanifest Spiritual nature, which is eternal and is transcendental to this manifested and unmanifested material nature. This Spiritual nature is supreme and is never annihilated. When all in this material world is annihilated, those Spiritual worlds remains as it is."
"avyakto ’kshara ity uktas
tam ahuh paramam gatim
yam prapya na nivartante
tad dhama paramam mama" (Bhagwat Gita: Chapter Eight verse 21)
"Sri Krishna said: That which the Vedantists describe as Spiritual unmanifest and infallible, that which is known as the supreme destination, that place from which, having attained it, one never returns—that is My supreme abode in the Spiritual world."
"purushah sa parah partha
bhaktya labhyas tv ananyaya
yena sarvam idam tatam" (Bhagwat Gita: Chapter Eight verse 22)
"Sri Krishna said: The Lord / God, who is greater than all, is attainable by unalloyed devotion. Although He is present in His Spiritual abode, He is all-pervading, and everything is situated within Him."
So let's always pray to The Lord Krishna, who is greater than all, with full devotion. By doing so we can attain to His Spiritual abode where there is no misery of any type & which is full of bliss.
Jai Shri Krishna