They assume that since they are a good person God will allow them into Heaven. Hell, of course, must be for the really bad people. So, the dividing point of making it to Heaven must be somewhere between being a real good person and a real bad person. The only problem with this logic is the Bible says that one sin is enough to keep a person from going to Heaven. Everyone who has sinned must go to Hell.
All sins are serious and have serious consequences.
It does not matter if you told a lie or murdered someone. God s judgment of us will not be based on how we compare to other people, rather, it will be based on how we compare to His standard. I have given the following illustration elsewhere in this book, but it s worth repeating. The difference is quite obvious. Yet, when you compare these two men next to a 60 foot light post, the men look quite similar in height.