A great comment from Mike Novacek on Charlie Rose in a segment on the American Museum of Natural History. This is from about the 15-minute mark:
One student asked me: What do you think is the biggest challenge for a graduate student? That's a good question for an applicant. And I told her that I think the big challenge is the moment, kind of the eureka moment, where you go through this metamorphosis, like an insect that suddenly sheds one skin and takes on another, where you move from...the fact finding mode of mental attitude to ones that's creative, one that's curious, one that makes inquiry, one that asks the right questions. And that's a fundamental transformation that's required.