An excerpt from Srila Prabhupada's letter to Brahmananda Prabhu in Aug 1967. Srila Prabhupada had suffered a heart attack and had returned to India to recover his health.
"Don't be afraid of my being attacked by maya. When there is a fight between two belligerent parties, it is always expected that there will sometimes be reverses. Your country and the western world is mostly under the grip of Maya(illusion) and the modes of nature in passion and ignorance, and my declaration of war against maya is certainly a great battle. Maya saw me very successful within one year, so that I got so many sincere young followers like yourself and others, so it was a great defeat to the activities of Maya: western country youngsters giving up illicit sex, intoxication, meat eating and gambling is certainly a great reverse in the activities of maya. Therefore, she took advantage of my old age weakness and gave me a death dash. But Krishna saved me; therefore we should thank Krishna more than eulogize maya. So far as my present health is concerned I think I am improving; atleast I am taking lunch better than in N.Y. So as soon as I am a little fit to return to the field of battle I shall be again in your midst."
-From Srila Prabhupada Lilamrita
This letter inspires me to fight on against all the challenges(small and big) that I face as I attempt to practice Krishna Consciousness in this material world.