First things first. Firhill is not the Etihad, as Patrick Roberts discovered to his dismay on his first visit to the West End.

Secondly, this Celtic team doesn’t seem to care for their surroundings. Salubrious or not, Brendan Rodgers has created a team capable of turning it on wherever they go. Stuart Armstrong and Leigh Griffiths were the men of the night, with Callum McGregor supplying the late cameo, as the Parkhead side steam-rolled Partick Thistle to claim a 4-1 win and tally up their 17th domestic game without defeat this term.

Pictures, too, tell a story and the narrative of this Celtic team is the cohesion and unity that Rodgers has given them. When Armstrong netted the second goal of the night just three minutes after the restart, only Craig Gordon was out of the equation as the midfielder was mobbed by his team-mates.

Every outfield Celtic player swarmed Armstrong to celebrate the goal, a show of camaraderie and spirit that has appeared to underpin what the Hoops side is about this term.

When Griffiths followed that up with a fine second, he couldn’t resist his own jig of delight. The striker has kept a steady counsel has he has found himself benched for much of the season but his own relief was evident as he celebrated his first goal since bonfire night and his 10th of the season.

It was a fine striker, too, and a reminder of just how instinctive Griffiths can be in an opposition penalty box. Cristian Gamboa, one of three changes Rodgers made, deserved credit for his part in it. Rodgers preaches an aggression and a relentlessness that was evident in the way the full-back bullied his way into an intercepted pass before pinging the ball to Tom Rogic.

The Aussie put Griffiths through but the striker was nipped to the ball by Adam Barton in the box, but the striker’s quick feet not only robbed the defender but then rolled away from his with a balletic turn before sinking the ball into the net.

It ought to have been game over but Celtic, for the second week in a row, conceded a goal that by their own standards this season could only be described as cheap. Callum Booth’s free-kick wasn’t cleared by Celtic and Liam Lindsay’s was first to get his head to it as he threw the Jags a lifeline, a goal that Rodgers felt was offside.

Things could have wobbled further when Sean Welsh worried Celtic with an effort that was offside - or even later when Craig Gordon seemed to foul Ade Azeez and bring the forward down in the box. The Jags' man's first touch was heavy, but Gordon seemed fortunate to escape sanction when it looked as though some contact had been made.

Celtic, though, as they have throughout this season, carried menace with every forward foray. Griffiths was denied a second by a fingertip save from Tomas Cerny as the Hoops look to find the net again before Cerny's goal was breached again.

It was substitute McGregor who netted the fourth when Armstrong played in Emilio Izaguirre who chipped the ball in for the 23-year-old to convert.

While the glimpse of frailties at the back will be a source of irritation for Rodgers, the sustained form of Armstrong will continue to please.

Armstrong is fast turning into the most improved this season under Rodgers, quite a feat given the manner in which the Hoops boss has got the best out of a number of those in his charge. A Scotland call-up must surely be the next step for the midfielder, assuming he maintains the form he has shown for the Parkhead side.

Armstrong’s tenacity, his athleticism and the manner in which he has firmly taken his manager’s pointers on board have made him pivotal to the way that Celtic go for the jugular, no matter who they are up against.

As Thistle threatened to make it a stuffy, turgid night it was Armstrong who broke their resistance with the opening goal six minutes before the break, a goal that fractured the spirit of the Firhill side, with Griffiths deserving credit for doing the donkey work that teed up the opener.

Alan Archibald’s side had barely had a chance to stretch their muscles after the restart than Celtic had shut the game down, with Armstrong once again netting a sumptuous strike from the edge of the box to net his fifth goal in his last ten appearances.

Gary Mackay-Steven had earned a starting jersey too following the impressive cameo role he played on Tuesday evening but in truth the winger looked inhibited for much of the time he was on the park at Firhill.

Mindful perhaps of making the most of an opportunity that has been a long time coming, Mackay-Steven struggled at times to make the kind of impression that he would ideally have looked for.

Griffiths had looked edge in the early stages too as he had looked to serve the reminder of what he offers this Hoops team.

His first chance to remind Rodgers of the 40 goals he scored last season came when Rogic teed up Roberts who in turn fed the Scotland striker on the edge of the box.

Without the game time under his belt, Griffiths pondered for a fraction of a second allowing Tomas Cerny to bolt from his line and smother the shot.

He did not dither in the second half as he showed the fleetness of feet and swiftness of thought that made him the star of the show last season.