For them the death of Jesus was part of a divine plan to save humanity. The death and resurrection of this one man is at the very heart of the Christian faith. For Christians it is through Jesus's death that people's broken relationship with God is restored. This is known as the Atonement.he cross as sacrifice. The image of Jesus' death as a sacrifice is the most popular in the New Testament. The New Testament uses the Old Testament image of the Suffering Servant (Isaiah 53:5) and applies it to Christ.