I think that we all know what evil is. We have a sense of what's evil, and certainly killing innocent people is evil. We're less sure about what is good. There's sort of good, good enough, could be better - but absolute good is a little harder to define.
Everything I do in my life is very instinctual and in the moment. If I'm attracted to something, that's it. If I have reservations, those don't change till they're resolved. My first impression is how I go.