The Scottish Premiership leaders are edging closer to a domestic clean sweep, with a League Cup already won and Scottish Cup semi-final to look forward to this weekend.
And ahead of the clash against Inverness CT, Deila believes the jovial atmosphere felt around the club could tempt his top stars to stay a bit longer.
“The players are happy enjoy being in Glasgow and Celtic if they see the team is going forward they want to stay that is from my experience and that’s my job to make the staff and players feel well and have fun and look forward to coming to work,” he said.
“People want to enjoy it because it is not like that everywhere, I’ve had players come to me who are very unhappy and then money is nothing in my opinion.
“I think there has been a very good atmosphere here for a long, long time and it is getting better and better.
“People loosen up more when we know each other better and we are having a lot of fun here.
“One of the most important things to create things and get better is to laugh a lot and enjoy life and I think that is something the players are doing and the togetherness is very good.
“But also to be focused when we train, we know the moments to be very dedicated.”
Meanwhile, after Leigh Griffiths’ hat-trick against Kilmarnock in midweek Deila says he can still improve.
“I see a lot of potential in all of the players but the difference between a good and not so good player is how good they are at learning and taking in new knowledge and doing something with their career.
“Leigh wanted to make a change and he has got his reward I think you can see a lot of players have done the same.
“Leigh is one of them, Virgil is taking steps and Jason too, Emilio is getting better a lot of the players are into understanding and learning.
“What you did last night is not good enough tomorrow. You have to always be alert, learn new things learn from experiences and look around you. If you are in that way of thinking you will always be ahead of your opponents.”