What Jesus (and Paul) said about love and our responsibility or response to that.
This is a song about love. What Jesus and Paul instructed us to do; our responsibility.
If I have all the knowledge of this world but don't have love, I am nothing
If I give everything to the poor but don't have love, it's for nothing
Jesus said, love one another and love the Father with our whole heart, mind, and soul
If I say that I love you Lord but hate my brother, I'm a liar
If I give myself to be killed in your name but don't have love, it's for nothing