Since I've not read all the responses, hopefully I won't repeat what everyone states. Love is neither the horse or carriage, but instead, it's the bridle that controls the mouth of the horse. When we choose to be loving, then the bridle takes us on the better path. But when we choose to be hateful, the bridle takes us down the wrong path.
The carriage are the experiences that keep people together, while the horse is persistence and work. It takes work to keep a relationship together. And the Roads are the pathways that either lead to God or destruction. Our actions either bring us closer to God or deter us on to paths that lead us nowhere.