No this is not prosperity doctrine, or name it and claim it theology. This is Paul teaching in the strongest terms that we receive Christ by faith and that our salvation is Christ plus nothing. (Galatians 3)
Believe and Receive
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Christianity was never supposed to be a movement that we justify, it was supposed to be a faith that justifies us.
Is peace important? Where does it come from? And how is it related to Christmas?
Why follow Jesus?
It would be a mistake to take John literally, but equally it would be a mistake not to heed his warning.