What does the Bible say about sin and human nature?

The Scripture clearly indicates that sin is a pervasive reality affecting all mankind. Romans 3:23 states, 'For all have sinned and fall short of the glory of God.' This shows that every person is born in a state of rebellion against God, inheriting a sinful nature due to the fall of Adam. Moreover, Ephesians 2:1 describes the unregenerate as being 'dead in trespasses and sins,' emphasizing that apart from divine intervention through grace, no one can turn to God or achieve righteousness by their own efforts.