Hope this helps

Taken from the sleeve of Mercy Me's CD titled "Undone" which is the CD which "Homesick" is on
Homesick
During the making of this CD, we had several people close to us pass away including Jim's father, Bart's uncle and Bart's twenty year old brother in law. Not only are they gone, but they are in the physical presence of the very one who consumes our hearts. And that can make a guy incredibly homesick.