Quotation by Gilbert Keith Chesterton

The lunatic is the man who lives in a small world but thinks it is a large one; he is the man who lives in a tenth of the truth, and thinks it is the whole. The madman cannot conceive any cosmos outside a certain tale or conspiracy or vision. Hence the more clearly we see the world divided into Saxons and non-Saxons, into our splendid selves and the rest, the more certain we may be that we are slowly and quietly going mad. The more plain and satisfying our state appears, the more we may know that we are living in an unreal world. For the real world is not satisfying. The more clear become the colours and facts of Anglo-Saxon superiority, the more surely we may know we are in a dream.