sei panca-tattva mili’ prthivi asiya
purva-premabhandarera mudra ughadiya
pance mili’ lute prema, kare asvadana
yata yata piye, trsna badhe anuksana
The characteristics of Krishna are understood to be a storehouse of transcendental love. Although that storehouse of love certainly came with Krishna when He was present, it was sealed. But when Sri Caitanya Mahaprabhu came with His other associates of the Panca-tattva, they broke the seal and plundered the storehouse to taste transcendental love of Krishna. The more they tasted it, the more their thirst for it grew.
Sri Caitanya Mahaprabhu is called maha-vadanyavatara because although He is Sri Krishna Himself, He is even more favorably disposed to the poor fallen souls than Lord Sri Krishna. When Lord Sri Krishna Himself was personally present He demanded that everyone surrender unto Him and promised that He would then give one all protection, but when Sri Caitanya Mahaprabhu came to this earth with His associates, He simply distributed transcendental love of God without discrimination. Sri Rupa Gosvami, therefore, could understand that Lord Caitanya was none other than Sri Krishna Himself, for no one but the Supreme Personality of Godhead can distribute confidential love of the Supreme Person.
(Sri Caitanya-caritamrta, Adi 7.20-21, Purport )