How do we know the doctrine of eternal life through Christ is true?

The doctrine of eternal life through Christ is validated by the teachings of Jesus and the fulfillment of biblical prophecy. In John 6:47, Jesus clearly states, 'Verily, verily, I say unto you, He that believeth on me hath everlasting life.' This promise offers assurance to all who place their faith in Him. His resurrection further affirms this doctrine as it confirms His victory over death, providing believers the hope of eternal life. As believers consistently come to Christ for sustenance, they experience this life, which is characterized by a profound relationship with Him. Thus, the truth of this doctrine is both declared in Scripture and experienced in the lives of those who follow Christ.