How do we know our names are written in heaven?

In Luke 10:21-20, Jesus instructs His disciples not to rejoice in their power over spirits but rather rejoice because their names are written in heaven. This writing signifies the secure status of believers in God's covenant of grace. Assurance of being written in heaven comes through faith in Christ, as we recognize Him as our Savior and Lord. Additionally, the inward testimony of the Holy Spirit confirms this reality in believers' hearts, as we experience regeneration and are transformed by grace. As we trust in Christ, we receive witness from the Spirit that assures us of our eternal identity in Him.