"... 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 the 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 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."
~G.K. Chesterton, "The Everlasting Man"