“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 least 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 chess-board 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 minimise evil to a dot or even a blot. He realises 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 every thing 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.”