There is nothing in the world that could have just one side. I think that all things have two sides...black and white, dark and bright, good and evil...
There can be no light without darkness. I think we seek to light and kindness because we saw the darkness and evil. We could feel bad things and we don't want to feel it again. We can compare these to sides and we try to seek to the peace.
I guess we should love these both sides because they help to understand this world and our life. These both parts create our souls together. And all time we should do the best to be better!