One Moment of Perfect Beauty

One of my non-musical amusements is science fiction. On television, my favorite series was Firefly followed by the new Battlestar Galactica (up to season four when they went all wacky) and Star Trek (the original series, of course). But one of the most interesting and original series, probably because it was the brainchild of just one person, Michael Straczynski, was Babylon 5. There was one scene that, because of the music and the sheer incongruity of it, really sticks in the mind. This really didn't have a lot to do with the story arc or even character development. It was just one moment of perfect beauty:

According to whomever put this clip up on YouTube, the music is the Gregorian chant "Puer natus nobis est." The scene is from: There All the Honor Lies, Season 2, Episode 14.