It's one of my favorite songs by one of my favorite bands. I have the album. I bought it for "He Reigns" (a song that could easily appear in a Sunday Song Lyrics post in the future). "Adoration" was the hidden jewel on the album for me.
These lines lend this song the feel of "Little Drummer Boy" only it's Biblical (as much as I love LDB--and I really, really do--no such person is mentioned in Scripture).
The persona is rather like Simeon and Anna, those two devout elders who saw Jesus as a baby in the Temple, but they knew right away that He was The One.