Alan Hutton says Roy Keane's "volcanic" personality has been key to Aston Villa's impressive start.
The defender believes the Villa assistant has added fire to the dressing room after his summer arrival.
Villa are second in the Barclays Premier League and host Arsenal on Saturday after opening their campaign with four unbeaten games.
And right-back Hutton, who signed a three-year deal at the club this week, said Keane's famous passion is vital.
"He can be occasionally volcanic, is that threat useful? I think so, it keeps you on your toes, but you want to perform for yourself," he said.
"You know he'll give you the shot you need to perform and spur you on, it's not a negative thing.
"You just have to look at his career, if there's anything you need to ask he's the man to go to. Just to have a man like that in your corner is unbelievable.
"He's passionate about the game, so if anyone needs to say anything about the game he's the man to do it."
Aston Villa's Alan Hutton has signed a new three-year deal at Villa Park.
Aston Villa manager Paul Lambert believes owner Randy Lerner's honesty over his desire to sell the club has contributed to their best Premier League start in eight years.
Villa's 2-1 win over Hull, a scoreline that does not quite do justice to their dominance for the first hour, took them to seven points from a possible nine heading to the international break.
That is their best opening three-game return since 2006/07 and a far cry from the embattled atmosphere that shrouded the club towards the end of last season.
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I think what has helped is the chairman coming out and saying what he said.
That's given people a clear picture of what is happening.
Everybody knows the situation with the football club now, the way it is, it's out there.
The chairman's being great, he's done everything he can here.
The crowd have galvanised as well. They've realised if they stick with it and get right behind it I'm pretty sure we'll win more than not.
Villa currently sit third in the league.
Aston Villa midfielder Gary Gardner has joined Brighton on loan until January 1 2015.
Aston Villa coach Roy Keane smiled as he took the ALS ice bucket challenge.
He nominated former Villa boss Martin O'Neill to follow suit.