When a man lives in This World in expectation [of the World to Come], everything is happy.
A man has a nagging wife, but he's able to take it because of Olam Haba (the World to Come). (A wife can bring him to Olam Haba quickly. She shouldn’t have that purpose in mind, however; she should try to give him Olam Hazeh [This World].) When people live for the next world, for them this life is one endless happiness. — Foundation and Root (#228)