Our beloved student Śrīmān Hanumān Gosvāmī has already given some introduction about our movement. Lord Caitanya, five hundred years ago, ordered it. Lord Caitanya is accepted as Kṛṣṇa Himself in the form of a devotee. Kṛṣṇa, when He was personally present, He stressed that He is the Supreme Personality of Godhead. Mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya (BG 7.7). I understand that you are reading in this hall Bhagavad-gītā regularly. You know all these verses. Mattaḥ parataraṁ nānyat asti kiñcit. Kṛṣṇa says, mattaḥ: "beyond Me." Just like if I say, "Beyond me, this person," similarly, Kṛṣṇa says: mattaḥ parataraṁ nānyat.
So your prayer, nirākāra, or gagana-sadṛśa, that is one feature of Kṛṣṇa. Kṛṣṇa is person. The nirākāra, Brahman feature, is His effulgence of the body. That is expressed in the Bhagavad-gītā, brahmaṇaḥ ahaṁ pratiṣṭhā. The Absolute Truth is realized in three angles of vision according to the capacity of the devotee. Vadanti tat tattva-vidas tattvaṁ yaj jñānam advayam (SB 1.2.11). Tattva-vit. Tattva-vit means one who has realized the Supreme Truth. He is called tattva-vit. Tattva means Supreme Truth, and vit means one who knows.