You have been a little bit perturbed that the demons are eternally condemned, and I thank you very much that you have been compassionate with the demons. That is the sign of Vaisnavism. The Lord may condemn the demons, but because the Vaisnavas are there, there is ample chance for the demons to become blessed by the devotees of the Lord. The devotees of the Lord are so powerful that each and every one of them has the power of delivering many demons, even condemned by the Lord.
Letter to Revatinandana, 25 March, 1970