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.
“MRSA, which is a kind of super bug mutant, is killing 10,000 people a year in Britain.”
“The two most misused words in the entire English vocabulary are love and friendship. A true friend would die for you, so when you start trying to count them on one hand, you don't need any fingers.”