Elder Joseph was one of the few Athonites Who had experienced the sober intoxication of divine grace and thus could clearly tell if something was from God, the demons are one’s nature. As he himself explained: “We know that once everyone has tasted wine can tell if they give him vinegar instead. This is how you should understand divine grace as well. One who has already tasted it recognizes delusion. For the demons imitate grace he who has eaten the prude of truth, as we have said, those who fruit of delusion.”
Elder Joseph
~My Elder Joseph