Rabbi Nachman of Breslovs grandfather was a huge tzadik, Rabbi Nachman Hurdanka, he was a follower of the Baal Shem Tov. Once Rabbi Nachman Hurdanka's sister saw him bent over, stretched out on his hands and knees, involved in lighting a large pipe that the Baal Shem Tov had which reached to the floor. The sister, knowing her brothers holiness and stature, was very perturbed to see her brother in such a seemingly demeaning way. Rabbi Nachman Hurdanka sensed her troubles, and told her, "if you would know what I know about the Baal Shem Tov you would think that he is God Almighty B"H, Thank God I have more daas (knowledge) than you, and I understand that the Besh"t is just a servant of H"Y.
The generation of Jews that left Egypt, lived on manna and received the Torah are called the Dur Daya - generation of knowledge, the lowest maidservant having had experienced very high prophecy. Chazal, brought down in Rashi on the Tora (Bamidbar 21:5, from this verse our Sages actually learn that one's Rebbe is likened to God!), say that some of these people made a mistake by equating Moshe Rabbainu to God, and were chastised for this (but I don't think they were punished). From this we can learn that if a person has saichel (intelligence) he would be closer to mistaking the Tzadik for God - Heaven Forbid, than to shortchanging the supremacy of the Tzadik.