Why is it important for Christians to examine their lives for sin?

Self-examination before God is an essential practice for Christians, allowing us to identify and address areas of sin in our lives. Scriptures like 2 Corinthians 13:5 instruct believers to examine themselves to see whether they are in the faith. Sin, if left unchecked, can destroy our fellowship with God, as indicated in Malachi 3:9-10, where the people's failure to honor God results in a curse upon them. Furthermore, the Apostle Paul advises believers in 1 Corinthians 11:28 to examine themselves before partaking of the Lord's Supper, ensuring they do so in a worthy manner. This examination leads to repentance and a closer walk with God, affirming the necessity of living in accordance with His will and recognizing our dependence on His grace for ongoing sanctification.