Sorry, I was rushed in my response. I knew I forgot something
Ok, to start, I never said we are ignorant of what is really good and evil, but what is or should be. For all intents and purposes, God adheres to neither good nor evil. Good and evil, in the Biblical sense, is often interpreted as euphemisms for either “walking with God” or “walking against God”, respectively. If that’s true, God can’t possibly be either: he is something of a beacon or a guiding light.
Now, we have come to create new meanings for “good” and “evil”, as it applies to man in itself. Murder = evil. Giving to charity = good. Stealing from an orphan = evil. Helping a blind man across the street = good. So on and so forth. A lot of people have come to think that “good” and “evil” is just some ethereal, innate ruler that all things are judged by, hanging in the mists. If that were true, we might feel obliged to judge God. Such is not the case. As is shown in the Garden of Eden (even metaphorically), we may not always understand God’s rules or agree with them, but we see the effects of disobeying them.
Thousands of years of civilization later (yes, I believe in the theory of evolution), good and evil has become so ingrained into our way of life that we’ve come to believe we’re either born with and evolved with it wired into our brains (I don’t believe this is true) or we invented it in the first place (again, I don’t believe this is true), even when all along, it’s been just God’s (sometimes abitrary) rules.
Think of it this way: Humans aren’t supposed to lie, cheat, steal, murder and so on. We know this and are taught from birth. In the animal world, there are no such things as rules, and such concepts aren’t passed down from mother to baby. Now, when you get a new kitten, she doesn’t inherently know that peeing on the rug is bad, or she isn’t supposed to claw the furniture. You have to train her. You scold her and maybe spritz her with a waterbottle when she’s bad, and soon she forms distinctions between what she’s allowed to do and what she isn’t allowed to do. That, on a basic level, is “good” and “evil”. The rules make sense to us, as humans, but probably baffle the kitten, but she learns that she must live with it. She may even get angry at us from time to time, or feel hurt, but she has to learn one way or another right?
The kitten doesn’t understand the “why” anymore than we understand it as it applies to God. The human with the spray bottle isn’t being good or evil in any sense, he’s just doing what needs to be done. The same goes for God.