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CC Ādi 7.20-21

sei pañca-tattva mili’ pṛthivī āsiyā
pūrva-premabhāṇḍārera mudrā ughāḍiyā
pāṅce mili’ luṭe prema, kare āsvādana
yata yata piye, tṛṣṇā bāḍhe anukṣaṇa
sei — those; pañca-tattva — five truths; mili’ — combined together; pṛthivī — on this earth; āsiyā — descending; pūrva — original; prema-bhāṇḍārera — the store of transcendental love; mudrā — seal; ughāḍiyā — opening; pāṅce mili’ — mixing together all these five; luṭe — plunder; prema — love of Godhead; kare āsvādana — taste; yata yata — as much as; piye — drink; tṛṣṇā — thirst; bāḍhe — increases; anukṣaṇa — again and again.
The characteristics of Kṛṣṇa are understood to be a storehouse of transcendental love. Although that storehouse of love certainly came with Kṛṣṇa when He was present, it was sealed. But when Śrī Caitanya Mahāprabhu came with His associates of the Pañca-tattva, they broke the seal and plundered the storehouse to taste transcendental love of Kṛṣṇa. The more they tasted it, the more their thirst for it grew.

Śrī Caitanya Mahāprabhu is called mahā-vadānyāvatāra because although He is Śrī Kṛṣṇa Himself, He is even more favorably disposed to the poor fallen souls than Lord Śrī Kṛṣṇa. When Lord Śrī Kṛṣṇa Himself was personally present, He demanded that everyone surrender unto Him and promised that He would then give one all protection, but when Śrī Caitanya Mahāprabhu came to this earth with His associates, He simply distributed transcendental love of God without discrimination. Śrī Rūpa Gosvāmī, therefore, could understand that Lord Caitanya was none other than Śrī Kṛṣṇa Himself, for no one but the Supreme Personality of Godhead can distribute confidential love of the Supreme Person.