What does the Bible say about sin in relation to Christ?

In 1 John 3:4-9, the Apostle John clearly states that sin is the transgression of the law, and without Christ, all are condemned by that law. However, John emphasizes that Christ was manifested to take away our sins through His death on the cross. In Him, there is no sin, indicating His purity and the imputation of righteousness to those who believe. When believers are 'in Christ', they are considered righteous in God's sight because of Christ's sacrifice, not by their own efforts or works. Therefore, while believers may still sin in this life, they stand forgiven and justified because of their faith in Christ.