What we call 'evil' doesn't necessarily deserve any kind of respect or understanding, by any means; it just deserves an acknowledgement of its complexity so we can better understand it - so we can help prevent it.
Sentiment: NEGATIVE
Evil, by definition, is that which endangers the good, and the good is what we perceive as a value.
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.
Evil, when we are in its power, is not felt as evil, but as a necessity, even a duty.
Evil is unintelligible. It is just a thing in itself, like boarding a crowded commuter train wearing only a giant boa constrictor. There is no context which would make it explicable.
For something to be completely evil is to be nothing. Satan has good attributes - intelligence, for instance - but they are corrupted. I cannot reconcile myself emotionally to alternative understandings of evil.
Evil exists to glorify the good. Evil is negative good. It is a relative term. Evil can be transmuted into good. What is evil to one at one time, becomes good at another time to somebody else.
Much that we call evil is really good in disguises; and we should not quarrel rashly with adversities not yet understood, nor overlook the mercies often bound up in them.
There is no explanation for evil. It must be looked upon as a necessary part of the order of the universe. To ignore it is childish, to bewail it senseless.
Evil is an attack against human spiritual development and enlightenment. All evil, badness, neurosis - it has one motive and one motive only, which is to destroy - to destroy your chance of arising above yourself.
Evil is a source of moral intelligence in the sense that we need to learn from our shadow, from our dark side, in order to be good.