Final answer:
Christianity's central belief is that Jesus will bring spiritual salvation and eternal life to believers.
Step-by-step explanation:
Christianity holds that God has a three-part nature, known as the Holy Trinity, consisting of God the Father, the Holy Spirit, and Jesus Christ. The central belief is that Jesus, through his sacrifice on the cross, brings spiritual salvation and eternal life to believers. This belief sets Christianity apart from other religions and emphasizes the importance of Jesus in the Christian faith.