I love how theists always point to babies or beautiful nature, as evidence for a god, but they don't seem to point to: harlequin disease tay sachse, African eye worm, babies born without brains, etc for evidence for a god.
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.
