***From what I understand about Alex Murphy’s religious teachings, I can only do what God has decided I can do.***
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You are born in sin, and can only repent of that sin if God, through the person of the Holy Spirit, quickens you unto faith in Christ.
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You use different words, but they mean the same.
It matters not what His reason are, “can only repent of that sin if God” means to me that “if God” does not decide I am to repent, I cannot repent.
And “if God” decides I am to repent. I must repent.
Your objections are answered quite clearly in Romans, chapter 9. Take up and read.