"The sankirtana movement inaugurated by Lord Caitanya is a transcendental pastime of the Lord. 'By it I live simultaneously to preach and popularize this movement in the material world.' In that sankirtana movement of Lord Caitanya, Nityananda and Advaita are His expansions, and Gadadhara and Srivas are His internal and marginal potencies."
.
(Teachings of Lord Caitanya, Chapter 17)
.
.