From her longtime political activism to her Oscar-winning acting, Jane Fonda has never done anything halfheartedly, and she brings this characteristic intensity to her faith. When she talks about "feeling the presence of the Almighty," her view of Jesus, and the way she prays, her voice wells from deep within her chest. You may know this voice from her films (among dozens of others: "Barbarella," "Klute," "On Golden Pond," and currently in theaters, "Monster-in-Law"), or from her aerobics videos ("feel the burn!"), or from film reels from the sixties, when she spoke out against the Vietnam War. Fonda, now 67,...