When the Me'or Einayim traveled to the Baal Shem Tov Hakadosh zy"a for the first time, the Besht knew with ruach hakodesh that he was coming. He told his Rebbitzen to prepare a lot of good food for that Shabbos in honor of their important guest. However, when he entered the house, the Besht was unfriendly to him. He told his wife, "This man is a thief."
The Rebbitzen, who was able to discern a person's nature very well, said, "I can tell that he is a holy man!"
The Besht replied, "What I meant was that with his good deeds, he trying to steal all of Gan Eden and Olam Haba!"