Most of us get a sense of guilt. Some of us get it sporadically from when unflattering memories surface. Some of us constantly live with guilt. Take the platoon leader who commanded his men into death. That guilt will always be on his mind for the rest of his life, at every moment. For some, guilt may come moments after emotions boil over and commandeer the individual to do something they would never have if they had a clear head, and that may happen many times per day.
Does doing bad things make us bad people? It may but there's a difference between a bad person with is recognized as having a pure heart in God's eyes and one with a stolen soul that is possessed by the devil, and that difference is guilt.
Truly evil people do not feel guilt. Matter of fact, they get pleasure in doing evil things. Their goal is to destroy and bring down things that have been so masterfully built. If something is destroyed by someone who is not truly evil, they will feel bad for what they have done.
Evil people will also try and make someone feel guilty in order to control them. So there must be a sense of individual empowerment when it comes to guilt. One must know if their own guilt is a product of their own wrongdoings and the guilt is has not been projected onto the individual.
If you carry with you a form a guilt or another that only you know the inner workings of, take that as a sign that you're not an evil person.