Why is believing in Jesus important for Christians?

Believing in Jesus is paramount for Christians because it is through faith in Him that we are saved. Romans 10:9 expresses that if we confess with our mouth that Jesus is Lord and believe in our heart that God raised Him from the dead, we will be saved. This belief is not merely an acknowledgment of His existence, but a deep, personal trust in His finished work on the cross for our sins. The doctrine of justification by faith explains that through belief in Christ, we are declared righteous before God, not based on our works but entirely through His grace (Ephesians 2:8-9). Therefore, belief in Jesus is the foundation of our faith, enabling believers to experience true peace, hope, and everlasting life.