How do we know eternal life is a promise in the Bible?

Eternal life is a prominent promise in Scripture, rooted in the belief that all who trust in Jesus Christ are granted this precious gift. For instance, 1 John 5:13 states, 'These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life.' This assurance is not left to uncertainty; it’s a definite reality for those who have faith. The biblical narrative consistently emphasizes that it is through faith in Jesus—the Son of God—that believers receive this promise. As articulated during Nicodemus' encounter with Jesus, the necessity of being 'born again' underscores this truth, where transformation leads to eternal life.