What is Elie Wiesel strong and unique connection with Moshe the beadle?

Moshe the Beadle was Eliezer's teacher of Jewish mysticism, Moshe is a poor Jew who lives in Sighet. He is deported before the rest of the Sighet Jews but escapes and returns to tell the town what the Nazis are doing to the Jews. Tragically, the community takes Moshe for a lunatic.