C.S. Lewis, The Problem of Pain[Christianity] is not a system into which we have to fit the awkward fact of pain: it is itself one of the awkward facts which have to be fitted into any system we make. In a sense, it creates, rather than solves, the problem of pain, for pain would be no problem unless, side by side with our daily experience of this painful world, we had received what we think a good assurance that ultimate reality is righteous and loving.
Emotional pain sometimes is truly worse than physical pain. Your heart truly aches and there is no escaping it. It is worse when there seems to be nothing you can do about it. Like when there is pain in watching your child go through something difficult and you can't make it better. We know in the depths of our soul that there should be a reality that, in Lewis' words, is righteous and loving.