What does the Bible say about the assurance of salvation?

Assurance of salvation is a significant theme in Scripture, providing comfort to believers. Jesus affirms in John 10:28-29 that those given to Him will never be lost, emphasizing the security of the believer in Christ's atonement. This assurance is rooted in the idea that salvation is not based on personal merit but on God's faithfulness and the effectiveness of Christ's sacrifice. Furthermore, verses like Hebrews 10:39 highlight that true believers will persevere in their faith, ultimately inheriting eternal life. This overarching theme of security and the unbreakable bond between the believer and Christ forms the foundation of our assurance.