An evil person is unaffected by exposure so is consequently shameless. Even tho' their act is evil, they are not necessarily an evil person. Some will feel no remorse for their actions even when called to account. They once again may not be evil, they are just unwilling to deal with the wrong that they have done at that moment. The times when each of us has failed to do good to someone else when given the opportunity is more a symptom of our selfishness than it is a hardened evilness of character.
True evil is cold, hard, destructive, and it robs people of hope .
A truly evil person lacks the warmth of human emotion. He will not allow himself to be touched by the feelings of others. It is beyond being insensitive. It is a deliberate distancing, a choice to see others only as objects. For example, an evil father who beats his children is incapable of understanding the pain that he is causing goes beyond bruised flesh.