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

The doctrine of eternal life is rooted in Scripture, particularly found in passages like 1 John 5:11-12 where it explicitly states that eternal life is found in the Son. Furthermore, the transformative experiences of those who truly believe in Christ validate this doctrine, as true faith results in a heartfelt love for God and His Word, reflecting a genuine relationship with Christ. This love and devotion signify that believers have been truly given eternal life through their union with Him.