Lyrics of There must be more

Lord i groan, lord i kneel.
I'm cryin' out for something real.
'cause i know deep in my soul
There must be more!
Lord i'm tired, yes i'm weak -
I need your power to work in me.
But i can't let go, i keep hanging on -
There must be more!
There must be more!
River flow; fire burn.
Holy spirit breathe on me.