1 Peter 1:3
Born again Refers to the believer’s new life that is only possible because of the death and resurrection of Christ. First Peter’s use of new-birth language to describe salvation reflects Jesus’ teaching (1 Peter 1:23; 2:2; see John 3:3, 7).
Through the resurrection of Jesus Christ This rebirth is accomplished by Jesus’ resurrection from the dead and serves as the Christian reason for hope: certainty of future salvation. Once dead in their sins, Christians now live with assured hope of their own resurrection.