The yearning for change springs from deep in the character of our restless, questing, constantly-reinventing-itself country. That's part of what makes America great. But we don't always spend enough time thinking about what it takes to actually make the change we seek. Change is hard. That's one reason we're sometimes taken in by leaders who make it sound easy but don't have any idea how to get anything done.
-- Hillary Rodham Clinton, What Happened, p. 195-196