All have offended God. Every one has violated God's holy Law. He is a sinner. Corrupt and rebellious. Guilty before God.
Sin is complete.
For same reason a fish doesn't feel wet. We are totally immersed. If only there were evil people somewhere committing evil deeds, and it were necessary only to separate them from the rest of us and destroy them. But the line dividing good and evil cuts through the heart of every human being. Sobering consequence for sin.