Teshuva With Joy:
Sefer Emunas Chachamim (Ois 176) relates that Rav Meir of Apta zy"a (author of Ohr L'Shamayim) would encourage Yidden to serve Hashem with utmost joy. One year, on the eve of Yom Kippur, as everyone gathered in shul for Kol Nidrei, he said to the crowd, "Yidden, we have to appease the holy Torah because we failed to properly uphold it all year."
He said these words with so much emotion that everyone cried for two hours.
Meanwhile he went home and, when he returned two hours later, he saw that everyone was still crying. He screamed, "Yidden, this is not what I had in mind. You have to return to Hashem with simcha."