Both but the essence of the person is fluid and can be changed by any number of personal experiences. Deeds themself are or are not, they can’t be fluid. It’s either a good thing you’re doing or bad. Really it depends on the motive of the person.

I don’t believe a person is involuntarily evil or good, what you do is what I would consider evil or good. A good person can do something evil and they’re less of a good person. Just like an evil person can become good.

The most important thing is always be aware of the self, and how others perceive you. Always be thinking of why you’re saying what you’re saying, and how it will effect the perceiver. Understand you are a product of this world, and everything you know is because of you’re own personal experience. We’re all individuals on this magical plane of existence, and nobody really knows any more than that for sure.

Evil as a nature is itself, evil. The opposite of perceived good. So in itself, evil, can never be good. They are opposing ideologies, literal opposites. As long as you’re a good person with morals, evil will never be the answer. Evil may be the answer for an evil person, it may be the most logical/reasonable solution, but it’s still wrong.