r gustman taught at yesh tomchei temimah, r moshe said he'll manage even though teaching chabad chassidim. waiting for yechidus with 6th rebbe, rebbe not feeling well cancels yechidis, everyone leaves but him, he stays crying, he goes in a rebbe feels better, they said what'd you do, i told him i couldn't rest while he not feeling well, made him feel better with his caring