Last season, author/designer Ingrid Fetell Lee taught us about joy spotting. It’s the practice of going out into the world and finding ordinary objects that make you feel extraordinarily happy. But what about when you can’t leave the house? Well, it turns out joy lurks in all sorts of unexpected places — you just have to know where to look.

Last season, we brought you ideas with the power to change the way you see the world. Now that the world’s been turned upside down, we thought it’d be a good time to invite back some of our favorite guests to give us some much needed perspective in this confusing time.  We’re starting this special miniseries, “Big Ideas in Uncertain Times,” with Susan Cain, the bestselling author of "Quiet: The Power of Introverts in A World That Can't Stop Talking." She tells us about the upside to solitude, why introspection has never been more important, and even gives us a few tantalizing clues about her new book.