First Corinthians 15:50–57
O death, where is thy sting? O grave, where is thy victory? The sting of death is sin; and the strength of sin is the law. But thanks be to God, which giveth us the victory through our Lord Jesus Christ.
Paul’s teaching on the resurrection of Christians: when the last trumpet blasts and Christ returns for those who belong to Him. In that moment, all believers in Jesus, living and dead, will be transformed into the glorified, eternal bodies God has promised us. Death will be defeated forever, never to hurt anyone again. Sin brings death, and the law is the power of sin, but God has given us the victory over death by forgiving our sin through faith in Jesus and by His grace.
1 John 1:7
But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin.