Both passions were free because both were kept in their place. The optimist could pour out all the praise he liked on the gay music of the march, the golden trumpets, and the purple banners going into battle. But he must not call the fight needless. The pessimist might draw as darkly as he chose the sickening marches and the sanguine wounds. But he must not call the fight hopeless.
–G.K. Chesterton, Orthodoxy (p. 88)