“It is common in our day, as it has been in many other periods of the world's history, to suppose that those among us who are wise have seen through all the enthusiasms of earlier times and have become aware that there is nothing left to live for. The men who hold this view are genuinely unhappy, but they are proud of their unhappiness, which they attribute to the nature of the universe and consider to be the only rational attitude for an enlightened man.”