Seriously?? Saul of Tarsus, for one. Not sure whether you would count it as an appearance of "God," but many non-Catholics witnessed the Miracle of the Sun.Bigger question: Does God appear to Non-Catholics?
Bach's over arching desire was that his music might glorify God (which it does!), in whom he passionately believed. I don't think that as much can be said for quite a few Catholics of our times who compose 'music' for church use.
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