vṛndāvana-dāsa—Vṛndāvana dāsa Ṭhākura; ihā—this; caitanya-maṅgale—in his book named Caitanya-maṅgala; vistāri'-elaborately; varṇiyāchena—has described; prabhu—of the Lord; kṛpā-bale—by the strength of mercy.