Can a sinner do anything good by God’s standard? How would you go about showing what the Bible speaks of on this matter?
When a non-Christian helps an old lady across the street, that is sin, because it is not done for the glory of God, and therefore is stealing what is rightfully God’s.
“We are all like one who is unclean, all our so-called righteous acts are like a menstrual rag in your sight. We all wither like a leaf; our sins carry us away like the wind.” (Isaiah 64:6)
“Everyone rejects God; they are all morally corrupt. None of them does what is right, not even one!” (Psalm 14:3)
Those who are not saved have no faith in God therefore sin in everything they do: “But the man who doubts is condemned if he eats, because he does not do so from faith, and whatever is not from faith is sin.” (Romans 14:23)
“No one is good but God” – Jesus to the rich young ruler (Luke 18:18-19).