The Socceroos confirmed their spot at the top of Group B with a clinical and professional performance which ended in a 5-1 win at Allianz Stadium on Tuesday night.
And Cahill was a huge part of the success, scoring twice in the first half to take his international tally to 47 goals in 89 appearances.
It’s been a huge 18 months for the Socceroos, winning the AFC Asian Cup last year, with the side now well on track to qualify for Russia 2018.
“I’m very proud. I believe in Ange [coach Ange Postecoglou]…I believed form the very start and so do the boys,” Cahill told Fox Sports after the match.
“When you stick to a philosophy, you see the way we press, teams can’t live with us.
“You see how fit we are as well. It’s an amazing feeling to be out there and enjoy our football.
"That’s what we want to be known for, our football, our philosophy and the vision of what we’re doing.”
And some of the football the side played on Tuesday night was breathtaking, with Robbie Kruse, Tom Rogic and Aaron Mooy at the heart of some fantastic moves.
After not getting on the pitch at all in Adelaide, Cahill made the most of his start with his brace, while Brad Smith and Trent Sainsbury were also strong again.
“The depth is unbelievable. You saw what we did the other night against Tajikistan and you saw what we did tonight,” Cahill said.
“We just have to wait our turn and make sure we’re ready. Everyone that plays a part knows it’s for the longer cause and that to qualify for the World Cup.
“And there’s so many young players [Postecoglou] is finding every week,” he added. There’s seven players every camp that’s new.
“He’s waking players up, even now there’s players at home wishing that they are here and being a part of it.”
Cahill, who is 36 now, says there’s no time limit on his international career, not ruling out going all the way to Russia 2018 if the Socceroos can qualify.
And he reserved special praise for the coach for keeping him at the top of his game.
“If it wasn’t for Ange I wouldn’t be here,” Cahill admitted.
“When someone gives you a vision to make a difference and be a mentor, to change football in Australia…we can only do it by playing.
“If he gives me the chance I’m going to try and produce. It’s not about proving people wrong, it’s just about playing the football we know we can play.”