Another way of looking at good and evil is to understand it in terms of hot and cold. In reality, there is no such thing as cold, though we do pay a lot of money to cool our homes and offices and run our refrigerators. What we are actually doing, however, is removing the heat. That which has less heat is colder than that which has more heat. I believe that good and evil are the same type of thing, and that there is no such thing as evil, though there is much evil in the world.
Evil is really the lack of any good.
If we destroy or remove the righteous and good intentions of God in his creation, we in essence are causing evil. It is we who remove the good, or the proper intent. And the more knowledge some people have of the difference, the more they seem to want to remove the good. It seems to become boring for many people to continue to live in God's goodness. As with the reality of hot and cold, we can understand the reality of light and darkness, for there is really no such thing as darkness.