It was about the age of 13 for me.
My parents were not very religious, but definitely god believers.
My parents were not very religious, but definitely god believers.
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.