The Krsna consciousness movement is meant for devas, or devotees. Demons cannot take part in Krsna conscious activities, nor can devotees in Krsna consciousness take part in demoniac activities or work like cats and dogs simply for sense gratification. Such activity does not appeal to those in Krsna consciousness. Devotees accept only the bare necessities of life to keep themselves fit to act in Krsna consciousness. The balance of their energy is used for developing Krsna consciousness, through which one can be transferred to the abode of Krsna by always thinking of Him, even at the point of death.

From Srila Prabhupada’s purport to Cc Adi 3.91