How do we know death has been defeated by Christ?

The defeat of death is clearly illustrated in the resurrection of Jesus Christ. In 1 Corinthians 15, Paul argues that because of Christ's victory over sin and death, believers can face death with hope. Romans 5:10 emphasizes that we are reconciled to God through the death of His Son, reinforcing that Christ's death was a decisive act that abolished the penalty of sin—death itself. The scriptures further teach that believers will be resurrected just as Christ was, signifying complete victory over death. Additionally, in 2 Timothy 1:10, it explicitly states that Christ has abolished death, showing that for those in Him, death no longer has dominion or power.