Everything has to be understood in opposition to something else. For some dang reason, the ego prefers to make one side better than the other, so we choose. And we decide males are better than females, America is better than Canada, Democrats are better than Republicans. And for most people, once this decision is made, it is amazing the amount of blindness they become capable of. They really don't see what's right in front of them. Once you see this, it's an amazing breakthrough, and that is the starting place for moving away from dualistic thinking.