How do we know that believers have assurance in death?

Assurance in death comes from the work of Christ on behalf of believers. The Scriptures affirm that Christ was manifested to take away our sin (1 John 3:5), and for those who are in Him, there is no condemnation (Romans 8:1). This assurance is foundational in understanding the nature of death for a believer, as they face it with confidence, knowing that the sin that creates fear has been dealt with. Additionally, as noted in Acts 7, the manner in which Jacob's death is described captures the hope believers have; he was gathered to his people, reflecting the promise of eternal life with the elect through Christ. This assurance rests in the full possession of Christ's righteousness, which remains unborrowed and secured for the believer.