How do we know that all people have sinned?

The doctrine that all have sinned is foundational to Christian theology and is explicitly stated in Romans 3:23, which declares that, 'for all have sinned and fall short of the glory of God.' This universal condition underscores our need for salvation through Jesus Christ. In the sermon, the preacher emphasizes that just as the woman caught in adultery was guilty and deserving of death, so are we all guilty before the law of God. This shared guilt is essential for understanding the necessity of Christ's redemptive work on the cross, where He bore the penalty for sin for all His people.