Are you writing from the heart?

So today's song is 'Come On! Feel the Illinois!: The World's Columbian Exposition/Carl San' by Sufjan Stevens. It's from his Illinois album. Back in 2004 he started 'The Fifty States' project, where he intends to write an album for every state. He started with Michigan, then moved on to Illinois. So far he's only done two, but they're both great.

Anyway, I decided to use this song for today because the title of my blog is from that song. My favorite lines from this song are:

Even in his heart the devil has to know the water level
Are you writing from the heart?

I feel that those two lines don't really fit together, but somehow it flows really nicely in the song. They both have totally different meanings to me.