What does 'self-examination' mean before the Lord's Supper?

Self-examination before partaking of the Lord's Supper is a call to recognize our own unworthiness and need for mercy from Christ. The Apostle Paul instructs believers to examine themselves, but this examination is not about determining personal merit; rather, it should drive us to the feet of Jesus, acknowledging that our righteousness is as filthy rags. This process of self-reflection should lead us to appreciate the grace of God, realizing that the Supper is a representation of Christ's body and blood, which serves as the perfect substitute for our sins. Thus, when we partake of the elements, we express our faith in Christ's redemptive work, fully accepting that it is His righteousness alone that makes us acceptable before God.