Celtic captain Callum McGregor believes Martin O'Neill's understanding of the club allows the interim manager to sprinkle some magic "dust" on the team.
The 73-year-old Northern Irishman has won 14 out of 17 matches over his two spells in charge this season and suffered only one defeat, while the two draws came after Celtic received red cards while leading.
"He's brilliant, he's very honest and he's very down the line," midfielder McGregor told Celtic TV.
"He tells you when it's good, he tells you when he wants more, but he's got an amazing feel for Celtic.
"When you understand Celtic and you understand what it's about, it gives you that feel to say the right thing at the right time - and he's had an amazing impact on the players."
McGregor points out that assistant Shaun Maloney and coaches Mark Fotheringham, Gavin Strachan and Stephen McManus have taking a lot of the training.
"But the manager just comes in and sprinkles that dust on top and he's an amazing man-manager and he is getting the best out of the group, individually and collectively," he said.
"So he's been amazing over the two spells so far and you can see that the boys are fighting for him."
"He's a brilliant man and he tells you exactly what you want to hear."