Sefer Divrei Chana (Chelek Bais, Perek 8) quotes students of the Koloshitzer Rebbe zy"a as testifying that although the Rebbe generally was not an emotional person, on erev Yom Kippur, while he ate the Seudas Hamafsekes and sang the song "Yiratzef Tzom Amecha", tears would be pouring out of his eyes.
It is further related that one time during the Seudah Hamafsekes, the Rebbe stood up and loudly declared, "Through the middah of ahavas Yisroel, we can rise high, high, high... with no limits."