Why is belief in Jesus important for Christians?

Believing in Jesus is foundational to the Christian faith because it acknowledges Him as the Son of God who came to save sinners (John 3:16). As expressed in John 11:25-26, those who believe in Christ will not die spiritually but will live eternally. Our assurance of salvation rests in this belief, which activates the grace of God to transform and purify our lives (Ephesians 2:8-9). The call to belief is not simply a mental assent but a heartfelt response to the revealed truth of God's love and our need for redemption, leading us in faith toward Christ.