It's the question don Miguel Ruiz says we're all trying to answer: Who are we really? Watch to find out why he says the answer might not matter as much as we think it does.

Oprah's full interview with don Miguel Ruiz airs Sunday, March 3, at 11 a.m. ET/PT. Watch on OWN or join our worldwide simulcast at Oprah.com or Facebook.com/supersoulsunday.