England centre Brad Barritt has said that the team will have to keep their heads while leaving it all on the line against Australia.
Lose to the Wallabies and England's tournament will be over, making Saturday's game an enormous challenge.
Barritt is backing the side to bounce back after last week's dramatic loss to Wales, hailing the team's mental strength.
"The loss (last week) was devastating for all of us but now this is a must-win game. This team has incredible resilience. We have had setbacks in the past and always responded well," Barritt said.
"There is always perspective after a loss but our destiny is in our own hands and we have to put that defeat behind us and move on.
"We are definitely going to be throwing the kitchen sink at this.
"We know this game is bigger than last week (against Wales) because it affects the outcome of the tournament. It is about keeping fire in your belly and ice in your head."
England being knocked out of their own Rugby World Cup would be a sporting disaster, but refreshingly Barritt spoke of his own awareness that in the big global picture he and the rest of the squad have a phenomenal opportunity in front of them.
"When you look at the world, there are tragedies. Ultimately we are living the dream. And if you don't seize it, it will pass you by. We won't be having regrets when we look back. We will go out and give it our all."