Just when you think you've had enough Neil deGrasse Tyson, another not-to-miss video comes along. This one comes from the 2006 Beyond Belief Conference, and it features the astrophysicist giving what's been called the "greatest science sermon ever." As a youngster, Tyson stepped into the Hayden Planetarium (the institution he now runs) and he felt an unshakable calling to study the universe. It wasn't unlike the feeling someone undergoes when they're religiously born again. And ever since, Tyson has experienced revelation after revelation, epiphany after epiphany, when studying the universe, and especially whenever he's reminded that, chemically speaking, we are in the universe, and the universe is in us. We're all made of the same stardust. How can that not leave us with an incredibly spiritual feeling?