How He Loves by David Crowder Band (http://youtu.be/TCunuL58odQ)
Now just to warn you, this song, like many other songs by Christian artists (more so by Christian artists than other genres I think), has seen many versions. In fact, the song How He Loves in particular has had at least six different covers. The version I have here is simply the most well known version.
The song itself was written and released in 2005 by John Mark McMillan as a commemoration of the death of his best friend. If you listen to his version, you can definitely feel his anguish. It's just a lovely song all around, no matter what version!
Here's the John Mark McMillan version: (http://youtu.be/U0luHiWwi08)
More info: (http://en.wikipedia.org/wiki/How_He_Loves)