It seems like it should not be so difficult to know what is good and what is bad. Almost everyone automatically knows that it is bad to kill someone else, do they not? Torturing people is understood to be wrong without explaining why it is wrong. But there are many things that are wrong and things that are right that we do not automatically understand.
On top of the unintuitiveness of the evil or goodness involved in certain actions, we are constantly being bombarded by the world with lies about what is good and evil. On the television shows and movies, the “good guys” often promote fornication, drunkeness, crude speech, revenge, etc. Speaking out against homosexuality or abortion is viewed as hate speech. We must learn to see through the propaganda of Satan and be disgusted by sin as God is.