“The fruitive workers, the salvationists, and also the yogis who are after mystic powers, are all unhappy because of unfulfilled desires. But the person in Krishna consciousness is happy in the service of the Lord, and he has no desires to be fulfilled. In fact, he does not even desire liberation from the so-called material bondage. The devotees of Krishna have no material desires, and therefore they are in perfect peace.” (Shrila Prabhupada, Bhagavad-gita, 2.70 Purport)