Justifying the default system serves a soothing function. It's an emotional painkiller: If the world is supposed to be this way, we don't need to be dissatisfied with it. But acquiescence also robs us of the moral outrage to stand against injustice and the creative will to consider alternative ways that the world could work.
-- Adam Grant (Chapter 1)

Importance: This quote helps set up a theme that runs through the book. Namely, that innovation is less a matter of innate ability than of willingness to act. Grant points out that original ideas don't just pop up out of nowhere. They have to come from somewhere. And in Grant's mind, that somewhere is places in which the way things are done are okay, but not great. This quote also addresses the main theme of this chapter, which will be visited again later. Who is mostly likely to not only have, but advance, original ideas.

Practice...
-- Grant (Chapter 1)