Compassion is not politeness, and isn't even the same as kindness. It's not doing good deeds for someone while quietly judging them! Compassion engages your whole person, and it requires vulnerability, which is part of what makes it so hard. We have to be able to allow ourselves to be present as an equal with another person, recognize the darkness in them and accept it—and that forces us to embrace, as well, the darkness within ourselves.