Why is believing in Jesus important for eternal life?

In John 6:29, Jesus emphasizes that the work of God is to 'believe on him whom he hath sent.' This belief is not merely intellectual assent; it involves trusting in Jesus as the sacrificial Lamb who bears the sins of the world. Because of our sinful nature, we are separated from God, but belief in Christ reconciles us to Him. Romans 10:9 states, 'If thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.' Thus, belief in Jesus is crucial because He is the mediator and His work on the cross satisfies God's wrath against sin, granting eternal life to those who have faith in Him.