When an individual gets things right with God, he should likewise look for opportunities to make things right with others he might have done wrong.
There are many things in this life that are not sinful in and of themselves, but when they are misused they can be deemed as sinful or harmful.
There are two categories of sin: sins against God and sins against man. By default, every sin is against God. Yet, not all sin is against man.
Scripture provides examples of specific sins; however, no example DEFINES sin. John's first epistle defines it as the transgression of the law.
