Today, I sat at the piano singing my own tune to the traditional lyrics of "How Great Thou Art." Remember Carpe Diem? Singing a different tune with well-known lyrics is like standing on a table and looking around at the room, instead of sitting in the chair. Different perspective...
I know it's hard to imagine that song with any other melody, until you sit and play, and it just flows with the unique melody God puts in you. And then, other lyrics may start to come. That's how it works for me...songwriting.
Grab a cup of tea, your favorite coloring book and markers (you do color, don't you?!) and listen. It's a wonderful way to awaken your creative spirit.