Sefer Raza D’Uvda (Shaar Ha’Osiyos L’Pesach, Ois 1) relates that Rav Levi Yitzchok of Berditchov zy”a and the Magid of Kozhnitz zy”a shared a very close bond of friendship. One year, Rav Levi Yitzchok told the Magid that he wanted to spend the Seder night together with him. However, the Magid was a very weak man physically and he was afraid to be together with Rav Levi Yitzchok because he knew that he was always full of fire and enthusiasm, and that he would often get excited, sing, dance, and jump around in an unnatural way. He knew that he didn’t have the energy to keep up with this type of avodah, so he tried to refuse. However, Rav Levi Yitzchok insisted and eventually convinced the Magid to agree to be in the same house with him for the Seder, albeit in separate rooms.
On the Seder night, the Magid went into his room, closed the door and began to recite the Hagadah. Rav Levi Yitzchok went into his room and began conducting the Seder with much enthusiasm and very loudly. When he got to the words: “Matzoh zu she’anu ochlim al shum mah”, he got so excited that he got up from his seat, ran into the Magid’s room, and jumped onto the table. The entire table fell over, breaking everything that was on it. He then ran over to the Magid, grabbed him by the shoulders, and began to shake him. He cried out, “Heiliger Kozhnitzer Magid! Matzoh zu she’anu ochlim al shum mah? Why do we eat this matzoh?”
He was so immersed in his avodah that he didn’t even realize how hard he was shaking this weak man. He didn’t realize that he had broken all of the cups and dishes and spilled the wine. This was the extent of this great man’s enthusiasm for ruchnius.