Whoever stands before God in their own righteousness will fail. Bob was looking at his life. God has a strict standard and strict rules that we need to pass to enter His kingdom, and no one that has ever lived (except Christ) is good enough because "all have sinned, and come short of the glory of God;" Rom 3. But if Christ is covering us when we walk in front of the Judge, He will not see any fault. Heaven isn't cheap to get into, God is strict about what goes in.