Chesterton on the problem of evil from his book, The Everlasting Man:
“…But if [Christianity] is not a mythology neither is it a philosophy. It is not a philosophy because, being a vision, it is not a pattern but a picture. It is not one of those simplifications which resolve everything into an abstract explanation…It is not a process but a story. It has proportions, of the sort seen in a picture or a story; it has not the regular repetitions of a pattern or a process, but it replaces them by being convincing as a picture or a story is convincing. In other words, it is exactly, as the phrase goes, like life. For indeed it is life.
An example of what is meant here might well be found in the treatment of the problem of evil. It is easy enough to make a plan of life of which the background is black, as the pessimists do; and then admit a speck or two of star-dust more or less accidental, or at in the literal sense insignificant. And it is easy enough to make another plan on white paper, as the Christian Scientists do, and explain or explain away somehow such dots or smudges as may be difficult to deny. Lastly, it is easiest of all, perhaps, to say as the dualists do, that life is like a chessboard in which the two are equal, and can as truly be said to consist of white squares on a black board or of black squares on a white board.
But every man feels in his heart that none of these three paper plans is like life; that none of these worlds is one in which he can live. Something tells him that the ultimate idea of a world is not bad or even neutral; staring at the sky or the grass or the truths of mathematics or even a new-laid egg, he has a vague feeling like the shadow of that saying of the great Christian philosopher, St. Thomas Aquinas, ‘Every existence, as such, is good.’ On the other hand, something else tells him that it is unmanly and debased and even diseased to minimize evil to a dot or even a blot. He realizes that optimism is morbid. It is if possible even more morbid than pessimism.
These vague but healthy feelings, if he followed them out, would result in the idea that evil is in some way an exception but an enormous exception; and ultimately that evil is an invasion or yet more truly a rebellion. He does not think that everything is right or that everything is wrong, or that everything is equally right and wrong. But he does think that right has a right to be right and therefore a right to be there; and wrong has no, right to be wrong and therefore no right to be there. It is the prince of the world, but it is also a usurper. So he will apprehend vaguely what the vision [Christianity] will give to him vividly; no less than all that strange story of treason in heaven and the great desertion by which evil damaged and tried to destroy a cosmos that it could not create. It is a very strange story and its proportions and its lines and colors are as arbitrary and absolute as the artistic composition of a picture …
But that strange story has one small, advantage over the diagrams. It is like life.”
~G.K. Chesterton, “The Everlasting Man”