What does the Bible say about assurance of eternal life?

The assurance of eternal life is fundamentally rooted in Scripture, particularly in 1 John 5:13, where the Apostle John writes that he has written these things to believers so that they may know they have eternal life. This assurance is not based on personal merit but on the completed work of Christ. Therefore, believers can have confidence in their eternal status because it relies on the faithfulness of God and the redemptive work of Jesus.

For believers, assurance is strengthened through the preaching of the gospel. Regularly hearing about the person and work of Christ serves to confirm and deepen their faith. It is through the exposition of the glorious gospel that God reassures us of His love and mercy toward us, fostering growth in grace and a stronger faith. This repeated declaration of God's promises is vital for spiritual well-being and confidence in our relationship with Him.