It's a week for faith and belief.
Faith that the Republic of Ireland won't freeze on the biggest stage of their lives when they face Australia in front of 83,000 fans in Sydney; belief they can get something out of an extremely difficult game.
In Milford, Co Donegal, they'll be changing the time of morning Mass to make sure they can all get home to support one of their own: Amber Barrett.
"They have moved Mass earlier on Thursday, so they can accommodate the 11am kick-off," Barrett laughed. "That says it all. Hopefully Jesus does us a wee favour on Thursday night.
"[The hype] is starting to build, my dad is on his way, my brother has done flight one, my mum was saying I have a shout-out at Mass, so I think I have officially made it."
Ireland are here in Australia because of Barrett's winning goal against Scotland in the play-off last October.
She sealed her place in the World Cup squad with a brace against Zambia in June and has a knack of making a big impatc off the bench.
The 27-year-old won't start against the Matildas at the Accor Stadium, but Vera Pauw is certain to turn to the Standard Liege striker at some point during the three group games.
"I have said it a million times before, I just always believe that I am going to get a chance to score," she said.
"Of course, that doesn't always happen. It depends on how the game is going but I think going into a game like that, I am in the mindset that I have to be really difficult to manage for whatever length of time it is and then when the ball drops to me, I am backing myself to score because at that stage of the game, there is nothing to lose.
"You are one-nil down and you want to get something out of the game. And I think that is the most important attitude to have."
Barrett has recently joined Standard Liege in Belgium after a difficult campaign with German outfit Turbine Potsdam.
She's a straight talker with plenty of self-confidence, typified by a casual reference to a potential reunion with ex-Ireland boss Colin Bell, now managing South Korea.
"He always believed this Irish team would qualify for a major tournament and he has qualified as well with South Korea. It is kind of nice that we are not playing each other but when we get out of the group, it might be nice to meet them at some stage.
"I think you have to [believe you can progress from the group] because if anyone had said to us when the draw was made for qualifying... how many people genuinely believed we could go to Sweden, get a result, beat Finland in Helsinki, beat Slovakia away?
"We have always had that belief in ourselves when the game-plan is right and everyone knows what they are doing, it is all down to performance. And you can have the perfect preparation and the performance isn't there, but with our team when the performance is there, we are very, very hard to beat."
She has gained a reputation as being a super sub, a different option off the bench capable of making something happen.
It's one Barrett is happy to embrace as she dreams of more glory nights.
"People feel a wee bit insecure about the 'super sub' label but at the end of the day, it doesn’t bother me one bit because I think I have proven – six of the seven goals I have scored for Ireland I have scored off the bench, so I will take that with me and that is something that I will improve on. And continue working on.
"I will keep striving to be the striker that she wants to start, but if I can’t do that, I will make sure that I am ready to go when called upon.
"They say positive manifestation is so important and I have visualised myself scoring hundreds of goals and if I have scored all the goals I have thought about, I would be the poster-girl, Sam Kerr wouldn’t be the poster-girl. It is not the way it works.
"But it is important to have that mindset that you can see yourself scoring and if you have that, anything is possible."
Watch Republic of Ireland v Australia in the 2023 FIFA Women's World Cup live on RTÉ2 and RTÉ Player on Thursday at 11am, follow a live blog on RTÉ.ie/Sport and the RTÉ News app or listen to live commentary on 2fm
