Life is a constant state of both joy and sorrow, dark and light, bitter and sweet. In a meditative conversation, author Susan Cain explores how being attuned to the bittersweetness of life -- and being fully present for both the happy times and the sad times -- helps us navigate love and loss and connect to the "insane beauty" of the world. (This conversation, hosted by TED current affairs curator Whitney Pennington Rodgers, was part of an exclusive TED Membership event. Visit ted.com/membership to become a TED Member.)