Outside of Vaikuntha, the abode of Krsna, which is called paravyoma, is the glaring effulgence of Krsna's bodily rays. This is called the brahmajyoti. The transcendental region of that effulgence is called Siddhaloka or Brahmaloka. When impersonalists achieve liberation, they merge into that Brahmaloka effulgence. This transcendental region is undoubtedly spiritual, but it contains no manifestations of spiritual activities or variegatedness. It is compared to the glow of the sun. Within the sun's glow is the sphere of the sun, where one can experience all sorts of varieties.