Yes, you can pray to Krishna - Krishna may be prayed that I am unwilling to become Krishna Conscious, so you can force me to become so. You put me under certain circumstances so that I may be forced to accept Krishna Consciousness. You can pray like that.
It is Krishna's special favor and mercy that He sometimes forces a devotee to surrender fully to Him.
 - Correspondence, Los Angeles, November 1968

Anyone who gives some service to this Krishna Consciousness movement is fortunate proportionately. At least the seed of his fortunate life is sown there. Whether he gives service of some sort, willingly or even unwillingly, the seed is sown, and the fortune will come proportionately. Even if somebody looks shabby and unclean, if he simply says this Krishna Consciousness is very nice thing, even he is not able to take full advantage of it at the time, still he is far more fortunate than any Rockefeller.
 - Correspondence, Los Angeles, November 1968

From Krishna's side, naked or dressed, He is Krishna. And from our side, if we nicely dress Krishna and nicely feed Him, He is appreciating our service and we are certainly benefited. Krishna is the same; He does not require us to dress Him, or feed him, etc., but the more I serve by dressing, feeding and caring for Him, He appreciates the service, and I become more Krishna Conscious.
  Correspondence, Los Angeles, November 1968

Even if somebody is not able to execute fully Krishna Consciousness, whatever amount of service he does it never goes in vain.  It will eternally remain. And it will act. Even if somebody does small amount of service, and not even very willingly, still, he is assured to get human body in next birth, and chance to execute some service further. So there is no question of failure in Krishna Consciousness. It is only success. Krishna says, My devotee is never vanquished. So we must try sincerely, that's all.
- Correspondence, Seattle, November 1968

It is said by one Vaishnava poet that in every form of life, one gets a father and mother, because without father and mother, nobody is able to get a material body.
So father and mother is possible in any form of body, but only in this human form of body one can get in touch with Krishna and a bona fide Spiritual Master. That is the highest gain of our travelling in different species of life in different planets.
- Correspondence, Los Angeles, November 1968