The Belief of Redemption
The thought that people are not perfect is a common theme throughout the world because it is often observed by almost anyone, and many religions have a central tenet that leads their practitioners to the belief of redemption. They are encouraged to stay within the moral and legal boundaries of their culture, but straying from them is often seen as nothing more than a mistake. The ability to receive forgiveness for their errors is a way for them to remain within their society, and it gives them the opportunity to find a path back into a normal life.
Forgiveness and redemption are practiced in many religions, and it can be as simple as speaking to a particular deity to ask for forgiveness. Some religious practices require a great deal of ritual before a person is able to find redemption, but others hold the belief that a sacrifice of some sort must be offered before true forgiveness can be granted.