Extracted from Rabbi Abraham Twerski’s “Four Chassidic masters,” page 18 on the introduction to teachings on Chassidus:
“Rebbe Reb Zusia of Anipole had a chassid who would give him money from time to time, and the chassid prospered. Once, when the chassid came to Reb Zusia, he was told that Reb Zusia had gone to his Rebbe, the Maggid of Mezeritch. The chassid said, “if the Maggid of Mezeritch is Rebbe Zusia’s Rebbe, the be must be greater than Reb Zusia,” and now, gave the the Maggid instead.
His business began to fail. He asked Rebbe Zusia why that had happened, and Rebbe Zusia said, “When you did not discriminate and gave to Zusia even though he was not deserving, then Hashem did not discriminate and gave to you. But when you sought to give only to a great tzaddik, Hashem also decided to give only to a great tzaddik, and you did not qualify.” “