"The Talmud (Brachos 54a) says that a person is obligated to bless the Almighty for misfortune with the same joy as when one blesses for good fortune. How is it possible to fulfill this obligation?"
Rabbi Zushe was extremely poor and lacked even basic necessities. Though he had many difficulties in his life, he was always happy. Two people were sent to the study hall where they found Rabbi Zushe, and told him their teacher said he would explain how it is possible to bless the Almighty with joy over misfortune.
"I'm surprised that your Rabbi sent you to me about this," replied Rabbi Zushe. "You should rather ask someone who suffered some misfortune in his life. I have never experienced anything bad in my life. Only good things have happened to me."