You have to understand that you are just an animal. That has evolved and developed the ability to think. Now we are captured between our thinking and our human nature. Because we were trained after all these rules of society that were created by thinking. There is no evil or good. Your feelings and instinct just tells you what is normal for a human. Its your human nature. You have to live after your human nature to be free and happy. You have to neglect your thinking and listen to your human nature. The truth is youre just an animal like a lion that hunts buffalos. And doesnt think about evil and good when he kills the buffalo. He just lives after his nature which makes him happy.