Madhudvisa: He wants to know what the doctrine of Krsna consciousness is.

Prabhupada: Krsna consciousness means that you are part and parcel of Krsna, or God. You being separated, I have already explained, you are suffering in this material world. So you back to your father, go back to your father and be happy. That's all.

From Srila Prabhupada's lecture on Bhagavad-gita 3.27 at Town Hall — June 27, 1974, Melbourne