"One thing I know is if we go to the World Cup in 2015 expecting to win it we'll get beaten. We've got to go there with the attitude that we've got to take the World Cup by the scruff of the neck. We've got to earn the right to take it rather than expect everyone to lie down, because they won't."
Hansen's insight into the mindset the All Blacks want to take into the tournament came after his predecessor Graham Henry said a defeat might do the team good in terms of its development.
Hansen, Henry's assistant at the 2011 World Cup, said an honest assessment of the team - both in terms of game day and preparation - could be just as valuable.
"You find the inconvenient facts, so to speak, a lot easier when you're hurting," Hansen said. "But what we've tried to do over the last few years is find those things that make a difference to your performance when you're winning, so you don't have to lose."
Hansen, who has lost only one test with the All Blacks, said he didn't dwell on his successful record, but he did dwell on poor performances.
"I've sat and thought about the ones we haven't played well in. They're the ones that frustrate me, whether we've won them or lost them, they're frustrating games because you want to play well all the time."
The All Blacks' second tour party, including Hansen, left Auckland for Buenos Aires yesterday. Victory over the Pumas at La Plata next Sunday will almost certainly wrap up the Rugby Championship ahead of the crunch test against South Africa in Johannesburg.