sei kṛṣṇa - that very Lord Kṛṣṇa; avatīrṇa - has advented; śrī-kṛṣṇa-caitanya - in the form of Lord Caitanya Mahāprabhu; sei - those; parikara-gaṇa - associates; saṅge - with Him; saba - all; dhanya - glorious.

The selfsame Lord Kṛṣṇa advented Himself as Śrī Caitanya Mahāprabhu with all His eternal associates, who are also equally glorious.