How do we know that all men are guilty before God?

Romans 3:20 asserts that no one can be justified by the deeds of the law, since all have sinned. This universality of guilt reflects the fallen nature of humanity, inherited since the original sin. The law, whether written or natural, reveals sin but does not provide the means to righteousness. Consequently, every person stands guilty before God, unable to achieve justification through their actions. The acknowledgment of this guilt is vital for understanding the need for a Savior, highlighting the grace extended through Christ's redemptive work.