G.K. Chesterton, “Orthodoxy: The Romance of Faith,” Image Books, 1990.

“The materialist is sure that history has been simply and solely a chain of causation, just as the interesting person before mentioned is quite sure that he is simply and solely a chicken. Materialists and madmen never have doubts.” (p. 24)

“…what actually is the chief mark and element of insanity; we may say in summary that it is reason used without root, reason in the void.” (p. 27)

“…one set of thinkers can in some degree prevent further thinking by teaching the next generation that there is no validity in any human thought. … Reason is itself a matter of faith. It is an act of faith to assert that our thoughts have any relation to reality at all.” (p. 33)

“Not only is suicide a sin, it is the sin. It is the ultimate and absolute evil, the refusal to take an interest in existence; the refusal to take the oath of loyalty to life.” (p. 72)

“One rationalist had hardly done calling Christianity a nightmare before another began to call it a fools paradise. … Christianity could not at once be the black mask on a white world, and also the white mask on a black world.” (p. 85)