Holding back some part of our inner world is often lonely and isolating, Michael Slepian points out here, but it doesn't have to be. Drawing upon research involving 50,000 participants from around the world, Slepian reveals the surprising ways that secrets pervade our lives, and offers science-based strategies that make them easier to live with. The result is a window into the inner workings of our minds, our relationships, and our sense of who we are.