It is an old song that reminds her of God.
The song does not talk about God. But it is the song she had listened to, when she was at the ebb of her life. When she had felt God had abandoned her.

She had listened to this song when she had looked for him, amidst the rubble of her life. She had found Him, but only when she had glued back the pieces of her life. He was there when the rain had gone, the sun had come out and her life formed a rainbow. He had held her through out.

All that was a lifetime ago. Now she was too busy to think of God. She seldom had time for herself. Life had taken over her. 

Today, she heard the song on the radio. 

And she felt a presence. Of God.

She had abandoned him, but this time, He found her.