Nothingness
Sri Caitanya-caritamrta
CC Adi-lila
CC Adi 5.22, Purport:
Persons with a poor fund of knowledge conclude that a place void of material qualities must be some sort of formless nothingness. In reality, however, there are qualities in the spiritual world, but they are different from the material qualities because everything there is eternal, unlimited and pure. The atmosphere there is self-illuminating, and thus there is no need of a sun, a moon, fire, electricity and so on. One who can reach that abode does not come back to the material world with a material body. There is no difference between atheists and the faithful in the Vaikuṇṭha planets because all who settle there are freed from the material qualities, and thus suras and asuras become equally obedient loving servitors of the Lord.