Alice cooper, page-2

Paul teaches that if you place your belief/faith/trust in only the death/burial/resurrection of Christ for forgiveness of your sins you are saved and that there are no conditions attached.1 Cor 15:1-5, Eph 2:8-9, Gal 2:16, Rom 3:24-28, Rom 4:5-8.
So if Alice has done that then he is saved.
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Some believers dispute this by wrongly adding the teachings of the other Apostles that are relevant for a different age/audience.
Your thoughts ?