They are committed to alleviating misery and redressing grievances, to giving reign to the mind's curiosity and the soul's longing, to seeking beauty where they can, and defending truth where they must, to combating the ancient impulse to hate and fear the tribe in the next valley, to finding cures and consoling the incurable, to preparing for tomorrow's crisis, and to pursuing the questions others won't pursue because they're too busy or fearful or jaded. 