I used to doubt my salvation and every time I hear this song I would burst into tears. It was like God was reminding me that I was his and I had no reason to doubt. So every time I would hear the song now I rejoice in knowing that someday I will be sing it in heaven and have no worries no more. So if anybody is doubting in there salvation just know that it just might be that God is using that song to tell you that your are his and you are not alone.
Merry Christmas and Happy Hunnakuh.