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Technically speaking, when one stops believing in Christianity (any religion, actually), it is not a conversion, it is a deconversion.
Technically speaking, when one stops believing in Christianity (any religion, actually), it is not a conversion, it is a deconversion.
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.