No need to guess.Christ through Paul made it easy for believers...

No need to guess.
Christ through Paul made it easy for believers today to understand.
Place your faith/trust in the death/burial/resurrection of Christ for the forgiveness of your sins and you are saved/sealed.
1 Cor 15:1-4, Eph 1:13, Eph 4:30.
Are there conditions ?
Eph 2:8-9, Gal 2:16, Rom 3:24-28, Rom 4:5-8.
Some believers disagree and I still don't understand why.