Again and again I emphasize that the process of spiritual growth is an effortful and difficult one. This is because it is conducted against a natural resistance, against a natural inclination to keep things the way they were, to cling to the old maps and old ways of doing things, to take the easy path…. As in the case of physical evolution, the miracle is that this resistance is overcome. We do grow. Despite all that resists the process, we do become better human beings. Not all of us. Not easily. But in significant numbers humans somehow manage to improve themselves and their cultures. There is a force that somehow pushes us to choose the more difficult path whereby we can transcend the mire and muck into which we are so often born.
—M. Scott Peck, The Road Less Traveled