World Cup scars take a while to heal, and as a veteran of 78 caps, Iain Henderson can show you a couple.
The Ulster lock is at his third World Cup with Ireland and preparing for his third quarter-final. Only Conor Murray has started in more from this current squad. Infamously, they've only known defeat.
This time it will be different, we hope.
In 2015, Henderson was bumped into the first XV to partner Devin Toner in the engine room against Argentina after Paul O'Connell's ultimately career-ending hamstring injury, while he also started the last-eight defeat to the All Blacks in Tokyo four years ago.
The Irish squad has changed incrementally since that 46-14 hammering to the All Blacks, and Henderson is one of just six members of that starting side who will take to the field at Stade de France this evening for their rematch with Ian Foster's side.
For many supporters, that drubbing is still fresh in the memory, but Henderson (below) insists this team will not be burdened by the past.
"I'm not necessarily sure I'll be imparting wisdom but a huge, huge part of what we do, and what we try to bring as a squad is belief in what we've done in the past, and we honestly haven't spoken about the last two World Cups," he says.
"This is on the whole a different group, it's definitely a hugely different feel, it feels like a different management, we approach the game in a different way on match weeks."
Without being hyperbolic, there's every reason to declare this as the biggest game in the history of Irish rugby. Between their previous World Cup failures, their need to back up last year's series win against the All Blacks and the potential for it to be a final game for Johnny Sexton, there's motivation around every corner for Andy Farrell's side.
In a rarity for this fixture, all the pressure is on Ireland, but Henderson believes his side have shown over the course of their 17-game winning run that they can handle the expectation.
"Obviously that World Cup [in 2015], the team that was playing was relatively inexperienced.
"I felt going out, I'd say we had belief in what we could do but had we seen it done before from that particular group of players? Probably not, whereas obviously, right now I feel that the squad that we have, we have a lot more confidence throughout 1-33 in our squad now.
"Again, I tend to believe if there was any 15 picked out of that, we would have a fairly confident bet that the team would be able to pull it off.
"I think that's pretty much how this team has been built in this last, sort of, two to three year period versus that of that earlier group.
"This team has been put in difficult positions before when they had to come up with the solution, they've had to come up with the result and that's kind of where we like to take things, to kind of fill guys with more belief and understand that this is part of what they've been working for the last four years."
The 31-year-old started ahead of James Ryan at second row last week against Scotland and justified his selection with an all-action performance, capped off with Ireland's third try of the opening half.
He's retained his place in the starting side for tonight's meeting with the All Blacks, with Joe McCarthy coming onto the bench to replace Ryan who picked up a wrist injury in the second half last Saturday.
And while losing a player of Ryan's experience will naturally come as a blow to Ireland, Henderson says the vice-captain has been playing a big role behind the scenes.
"James and I are very close, he is a very good friend of mine and that extends outside professional things.
"So getting in touch, and sitting back down yesterday, he has a mass of experience in trying to come up with plans for excellent opposition, be it in a club game or international.
"This team works incredibly well as a unit irrespective of who is starting, be it Joe [McCarthy] sitting down and chatting through what he thinks they are going to bring, or sitting down with Bairdo [Ryan Baird] or Beirney [Tadhg Beirne] or James, we are fully behind each other, all together on this, and I am sure we will have a final desired outcome.
"In terms of New Zealand, obviously they have a massively, probably experienced pack.
"They have a number of really good athletes in there, guys who are good at reading lineouts but we have come up against opposition like this before, and for ever way of defending a lineout there's a way of attacking, and we hope to come up with a decent plan that will see us succeed in that area," he added.
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