The word “sin” is known to every person. Everyone knows that this is something bad, unworthy, deserving of condemnation. However, if you ask people to give a precise definition of the concept of “sin,” it turns out that few people can do it. Where did the concept of sin come from, what does it include, and what is true and what is false? The author invites us to understand where this concept came from, what behavior is sinful and what is righteous, and whether a person can choose for himself what he can consider a sin and what not. You will learn how sin originates and develops, which sins have biological roots, ways to get rid of sins, how other people can manipulate your sins, and also that some sins have positive sides.