>> “Why waste your time praying to a dead sinner who needed the same grace for salvation that you need? Why not go boldly before the very throne of grace?” <<
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The answer to this is deceptively simple:
One can pray to the demon that answers to “Mary” without risking being rebuked for anything by the Holy Spirit.
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The spirit behind praying to Mary and dead “saints” certainly isn’t the Holy Spirit, so it must be demonic.