I heard this song for the first time this weekend at the retreat I was serving on. It sort of became an unofficial theme song for some. It was written and sung originally by John Mark McMillan. Watch here for the story behind the song. Here is a link to the lyrics. (I've been listening to more of his music and I really like it)
Truly there is nothing greater than the Revelation of His passion and love for us. His love is devastating, and like she says at the end, If you have encountered the Father's love, you will never be the same.