Some people endure much more pain and suffering than others. Why is this so? What is the origin of suffering? Is evil external or internal? Does it

Some people endure much more pain and suffering than others. Why is this so? What is the origin of suffering? Is evil external or internal? Does it have any meaning? How should we respond to it?

Even more difficult is the problem of moral evil: some people deliberately cause other people to suffer. Why? If there is meaning in the universe, and especially if the universe is ruled by a beneficent deity, how can this be?