As a psychiatrist and Zen priest, Robert Waldinger has devoted much of his professional career to the question of what makes a good life. He currently serves as director of the Harvard Study of Adult Development, which is the longest scientific study of happiness. The study has tracked the lives of participants for over 75 years, tracing how childhood experiences and relationships affect health and well-being later in life. In his new book, "The Good Life: Lessons from the World’s Longest Scientific Study of Happiness," Waldinger shares what he’s learned from directing the study. In this episode of Tricycle Talks, Tricycle’s editor-in-chief, James Shaheen, sits down with Waldinger to discuss what makes a good life, the common regrets that people have toward the end of their lives, and how his Zen practice informs his work as a psychiatrist.