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>> “ts been said that anything added to faith alone in Christ alone...” <<
But if you discard what faith in him is, that statement is empty.
Faith in him is his entire presentation to us, believing all of what he said, doing all he did, and asked us to do, and it never ends, as John went to great effort and detail to tell us in his first epistle.
The way you use that statement is absolutely empty of meaning.
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It’s the Gospel.