Sri Gouranga Mahaprabhu & Sri Radha Madhav

“One cannot attain Rādhā and Kṛṣṇa by hearing the glories of Viṣṇu for a billion kalpas. Rādhā and Kṛṣṇa can be attained only by association with the gopis. And one cannot attain the association of the gopis except by taking shelter of the lotus feet of Gauranga. Therefore, please, constantly worship Gauranga with full devotion.
“Devotees exclusively attracted to the lotus feet of Gauranga, like bees attracted to nectar, certainly attain Rādhā and Kṛṣṇa. If You desire the goal of devotion-servitorship to Rādhā and Kṛṣṇa in Vṛndāvana, which is so rare in this world then go quickly to Navadvīpa and worship Gauranga, the ocean of mercy. At present, Kṛṣṇa, the dearmost of Radha, is residing there in the form of Gauranga.
“In order to bestow the mood of the gopis, Kṛṣṇa, the son of Nanda, has appeared in a two-armed golden form, with hands extending to the knees, and with pleasing eyes and face. In the dress of a devotee, He chants His own auspicious name in a loud voice and sometimes He chants ‘gopi, gopi, gopi.’
(Sri Navadvipa-Dhama-Mahatmya, Pramana-Khanda, Chapter 2)

By descending as an incarnation at Navadvīpa, You, just like Kṛṣṇa, have already delivered all the living entities of the universe.
(CC Antya 3.86)

Kṛṣṇa is one, but when Kṛṣṇa wants to enjoy, He must expand His pleasure potency. That is Rādhārāṇī. Rādhā kṛṣṇa-praṇaya-vikṛtir. Kṛṣṇa cannot enjoy anything material. The original spiritual potency, pleasure potency, is Rādhārāṇī. So first of all He expanded, then again He combined together. That is Śrī Kṛṣṇa Caitanya Mahāprabhu. This is the study of the Gosvāmī. Rādhā kṛṣṇa-praṇaya-vikṛtir hlādinī.
Therefore Caitanya Mahāprabhu is given seat along with Kṛṣṇa. He's combination of Rādhā and Kṛṣṇa. We may not misunderstand that Caitanya Mahāprabhu is . . . imitating Caitanya Mahāprabhu, there are so many so-called avatāras. But this is approved by the śāstra. Kṛṣṇa-varṇaṁ tviṣākṛṣṇam (SB 11.5.32). Caitanya Mahāprabhu is Kṛṣṇa, same category, kṛṣṇa-varṇaṁ. Just like we say varṇa: brāhmaṇa varṇa, kṣatriya varṇa, śūdra varṇa, vaiśya varṇa. Varṇa means the same category, varṇa. Or kṛṣṇa-varṇaṁ means who is always describing Kṛṣṇa. Just like Caitanya Mahāprabhu is passing on the road, He's chanting,
kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa he
kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa he
kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa kṛṣṇa pāhi māṁ
(CC Madhya 7.96)
Therefore kṛṣṇa-varṇaṁ is He; iti kṛṣṇa. Kṛṣṇa is describing Himself: kṛṣṇa-varṇaṁ tviṣākṛṣṇam. But by His complexion, He is not black—very fair complexion.
(730306 - Lecture BG 10.01-3 - Calcutta)