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evangelist attempts to prove his assertion by quoting:

2Co:5:17: Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.

Eph:1:13: In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,

1Jo:4:17: Herein is our love made perfect, that we may have boldness in the day of judgment: because as he is, so are we in this world.

He is indeed a new creature just as 2nd Corinthians 5:17 says - a creature with two natures (not three) at war with one another (Romans 7:14-8:8 and Galatians 5:17). The spirit is not infallible, otherwise Paul would not have encouraged the Corinthians to "cleanse ourselves from all defilement of flesh and spirit, perfecting holiness in the fear of God (2nd Corinthians 7:1)."

Ephesians 1:13 describes "sealing" by the Holy Spirit, not regeneration of humans spirits. To seal is to set apart, as in a promissory note - to seal a contract. The seal of the Holy Spirit is the certainty of salvation for those who believe. It does not describe the perfection of the thing sealed. It speaks of the future rather than the present.

1st John 4:17 describes how love is perfected in us by our abiding in God (verse 16), so that we may rest in that love with full assurance through trials and tribulations. It is His love, not some human infallibility that gives us that hope.

None of those verses suggest any such inward infallibility given to the elect before the redemption of our bodies at the last day.