The great march of mental destruction will go on. Everything will be denied. Everything will become a creed. It is a reasonable position to deny the stones in the street; it will be a religious dogma to assert them. It is a rational thesis that we are all in a dream; it will be a mystical sanity to say that we are all awake. Fires will be kindled to testify that two and two make four. Swords will be drawn to prove that leaves are green in summer. We shall be left defending, not only the incredible virtues and sanities of human life, but something more incredible still, this huge impossible universe which stares us in the face.

G.K. Chesterton, Heretics (1905).