Former Brisbane Roar star Thomas Broich admits he has been blown away by Ange Postecoglou 's instant impact with Celtic.
And the German believes the 56-year-old's call to head to Glasgow without any of his own coaching team marks him out from other coaches.
Broich was a key man for the Roar side that ran roughshod over Australian football under Postecoglou's stewardship.
And he reckons his mentor's ability to get people to buy into his version of the beautiful game is universal after an impressive start to life in Glasgow.
Speaking to the Daily Mail, he said: "I'm actually quite surprised it's working so well already. And he did it by himself? he didn't bring anyone with him.
"I asked him about that, why he didn't insist on working with people he already knew and trusted.
"He told me: 'My job was to convince the people here to set this club on fire with excitement, create some passion and vision'.
"He liked that challenge, to win people over to his way of seeing football.
"Who does that nowadays? Normally coaches bring in a team of ten people! He did it completely by himself. He's a remarkable man. Incredible."
Postecoglou pulled no punches after his side's 4-0 defeat to Bayer Leverkusen back in September, at a time when results were on the wane.
And Broich admits the former Australia boss was equally bush behind closed doors as he refused to change his approach in the wake of indifferent results.
That approach has proven correct with Celtic undefeated domestically since September and the Premier Sports Cup trophy in the Parkhead cabinet.
He added: "He's progressing nicely but I think this is just the beginning.
"We saw that particularly in the last game against Bayer Leverkusen (a 3-2 away loss), which exposed the natural limitations of the squad.
"His approach was courageous, as always, but there was no way of competing with Leverkusen at that level at that moment. They needed signings.
"When I spoke to him about the Leverkusen game, he said: 'Look, we can play this game by parking the bus and maybe get lucky with a result. But that doesn't set us up to be able to beat teams like this in the future'.
"He believed the only way forward was to take it to Leverkusen, even take the risk of getting hammered but work on your playing style.
"By being disruptive in your approach and just sitting back, you're not going to get better.
"I was amazed, once again, by his approach. It's just what he does.
"It is about story-telling with Ange. For us, at Brisbane, it was about taking the road less travelled.
"He told us we could do what others had done before and maybe we'd end up in the same place, a good place ? and that would be cool.
"But what if we dared to do something unheard of? Maybe a brand of football that nobody had played in that league? He got us excited and curious. There were no limits.
"And once you start playing that football, wow, it's pure joy. You have the football for 70 per cent of the game.
"You might still lose the odd game but you're bossing games, dominating. There's no player in the whole world who doesn't love that brand of football.
"You can play super-ugly destructive football and win ? but not feel satisfied. Winning by playing Ange's brand of football is the best thing in the world."
