The same cannot be said, however, about tomorrow's game against St Mirren.
Turn up with the same kind of lackadaisical approach and they'll be out of the Scottish Cup before they know it.
And that is why Neil Lennon came out and slaughtered them after the 2-1 defeat at Motherwell the other night.
He knows that he needs to get a reaction from them – although at the same time I do think the criticism was wholly merited.
However, harsh as his words were to the press about his players in the aftermath of the game; it would have been nothing to what would have been said within the privacy of the dressing room.
The players are big enough to cope with that and the bottom line is that when you are playing for Celtic, you need to approach every game with the same appetite and desire to win it. So you would expect that they will be ready for whatever St Mirren will throw at them tomorrow.
They were gutted when the chance to win a treble slipped away from them, but winning a double is a considerable achievement too and they will want to end the season on a high with an appearance at Hampden.
But, just as Motherwell were the other night, St Mirren will be well up for this game tomorrow lunchtime.
They will be encouraged by the way in which they played against Celtic in the League Cup semi-final at Hampden last month.
Deservedly, they won that game, and I fancy that they will try a similar approach to tomorrow's game as they try and do the double over Celtic.
If Neil wants his side's progress to continue then they can't afford a repeat of the performance we saw against Motherwell.
In fairness to them, I think their league results and performances have essentially been good over the last few weeks, especially when you consider that they have such a massive lead in the SPL.
When that happens you have to accept that there will be times when complacency creeps in – it is only human. But tomorrow afternoon Celtic will need to find that edge again.
Georgios Samaras made his first start since the end of last month when he came back into the team during the week and Anthony Stokes was also handed a start.
Both players looked a bit off the pace, which is understandable given the fact that they have been out.
I fancy that Samaras will be eying up a start against Juventus in Turin next week if he gets some more game time under his belt.
He has reserved his best this season for the Champions League, but Lennon will look for a sound showing tomorrow.
It has been a decent season for Celtic up until now and they won't want it dwindling away now.
They need to find the hunger and desire to maintain their form and carry them over the finish line now with some style on the park.