Regarding encroachment by Maya: There is every possibility, at every time, because we are living in the kingdom of Maya. Her influence upon us is very strong, but as indicated in the Bhagavad-gita, 7th chapter, that in spite of her very great influence over the living entities, a living entity as soon as he fully surrenders unto Krishna, the influence of Maya will no more act upon him. This is a fact. So the more we become stronger in our Krishna Consciousness, the more Maya is aloof from us.
Letter to Hayagriva, 22 September, 1968