Sin demands atonement. Atonement puts God and man at one. When atonement is made man is cleansed and forgiven. In other words, things are made right.
In many ways, sin is simply sin. However, sins carry varying weights or repercussions. In fact, the Bible testifies that some sins are greater than others.
Paul was one of the most religious people ever to live. In spite of his religious efforts, he was condemned to hell until he trusted Christ as Saviour.
