ABC of Christianity:

Romans 3:23 For ALL have sinned, and come short of the glory of God;

To be saved and forgiven of your sin, you must Believe in Jesus Christ as your Lord and Savior, Confess him publicly, and be baptized for the forgiveness of sins and the gift of the Holy Spirit (Acts 2:38; Romans 10:9-10; Titus 3:4-7)