We continue our series through G.K. Chesterton's classic work Orthodoxy by looking at the similarities between atheists, liberal Christians, and lunatics. Here are some zingers from Chesterton himself:

"The men who really believe in themselves are all in lunatic asylums.”

"Imagination does not breed insanity. Exactly what does breed insanity is reason. Poets do not go mad; but chess-players do. Mathematicians go mad, and cashiers; but creative artists very seldom."

"The poet only desires exaltation and expansion, a world to stretch himself in. The poet only asks to get his head into the heavens. It is the logician who seeks to get the heavens into his head. And it is his head that splits."

"The madman is not the man who has lost his reason. The madman is the man who has lost everything except his reason."