Doubts for Tzadikim?

 Lekutei Moharan (063:6) The ant that lies inside the serpent’s mouth is the aspect of the tzadik of the generation, who is upright and righteous and possesses good character traits. Because he is wise and involves himself in their scholarship and philosophical investigation, probing these wisdoms, this tzadik suffers greatly when these scholars begin to engage in their philosophical investigation. He wages a fierce battle with them—i.e., with the aforementioned aspect of the serpent—for he is greatly assailed by doubts, untrue assertions…