The Demon Haunted World - Carl Sagan
Not specifically 'atheist', but it's a great book on how to think and evaluate ALL supernatural claims.
Not specifically 'atheist', but it's a great book on how to think and evaluate ALL supernatural claims.
You'd believe if you just opened your heart" is a terrible argument for religion. It's basically saying, "If you bias yourself enough, you can convince yourself that this is true." If religion were true, people wouldn't need faith to believe it -- it would be supported by good evidence.