How do we know that we are totally depraved?

Total depravity is a foundational doctrine of historic Reformed theology, illustrated by passages such as Romans 3:10-12, which states, 'There is none righteous, no, not one.' This condition of being unable to do good in the sight of God is rooted in the fall of Adam, leading to the reality that every part of humanity is tainted by sin. Acknowledging our total depravity underlines the necessity of God's grace and the redemptive work of Christ, who met the requirements of divine justice on our behalf.