He is good personified. In contrast, Robert's father is a man withering away. He is ugly, weak and cowardly. He is evil personified. He is death.
Great art speaks to our own experience.
This is certainly true for Braveheart , especially for us in America. Robert the Bruce discovers for himself that true nobility is not a matter of land, possessions or title. Instead, it is a matter of being true to one's conscience. The end of the film is not the death of Wallace, but rather the new life that Robert the Bruce now has as a result of Wallace's inspirational life. Robert realizes that Wallace truly lived and that his father had never really lived at all, at least not any kind of life worth living.