The abode of the Supreme Lord is in the spiritual sky, and it is named as Goloka. In the Brahmā-saṁhitā it is very nicely described, goloka eva nivasaty akhilātma-bhūtaḥ (Bs. 5.37). The Lord, although resides eternally in His abode, Goloka, still He is akhilātma-bhūtaḥ, He can be approached from here also. And the Lord therefore comes to manifest His real form, sac-cid-ānanda-vigraha (Bs. 5.1), so that we may not have to imagine. There is no question of imagination. The Lord's presence, by His causeless mercy He presents Himself in His Śyāmasundara-rūpa. Unfortunately, people with less intelligence deride at Him.