How do we know that sin is universal according to the Bible?

Romans 3:23 states, 'For all have sinned and fall short of the glory of God.' This foundational verse establishes that every human being is guilty of sin by nature, by choice, and by action. It further illustrates that humanity’s condition is not just a matter of external action but rooted in a depraved nature from birth, as mentioned in Psalm 51:5. This acknowledgment of our sinful state is critical for understanding why we cannot place blame for our sin on external factors; instead, we are called to recognize our inherent corruption and need for grace.