The experience of travelling, getting familiar with other languages, other cultures definitely helps. It makes you a better person.
If you are going to be successful, there is no point in having three or four top individual players, because those players will win you games, but they will never win you titles.
Believe it or not, the sky is blue here in Glasgow. I absolutely love it here.
It's very difficult to say that a player is irreplaceable because the nature of football means that someone always steps in to take the shirt and provides different elements to your team.
I went in to Reading with the full backing of the chairman, who was great to me, and I got 20 games. Even though it was a three-year project, and I was the guy who knew the club more than anyone, I got the sack after 20 games. Funnily enough, it had just started to pick up, but they lost their patience.
It turns out I share a birthday with Jose Mourinho. He is exactly 10 years older than me.
My biggest mentor is myself, I've always felt.
Celtic are the club I supported as a boy, and I loved every moment I was there. For me to leave there, I knew I was going to have to not just come to a club, but I had to come to a special club that was going to allow me to connect with the players and hopefully the supporters, too.
I'm very proud of my work at Watford in what has been a short period.
The word you sometimes get is 'deluded,' they use, but for me, I've always been very positive.
If I was making the decision normally, with my heart, I'd never leave Celtic. My life was great. I loved the city. I loved the people. I loved the club. I had a wonderful life. If you think of all those things, you'd never move.
When you have a son in football like Anton, it will always be deemed as if he got the prop up and given the contract, no matter how hard he works. So much so that when he was offered a deal at Chelsea, I advised him not to take a professional contract.
I always say to the players, 'You can either create or wait.' If you're waiting, you're relying on someone else, as simple as that. But if you create it, you've got to do it.
How you succeed is how you deal with failure. Whatever way you dress it up, something hasn't worked.
I suppose that fear of failure is what drives me on.
I like teams to control and dominate the ball so the players are hungry for the ball.
If you give a good player time, he can kill you.
When you're so young, it's important to understand exactly what your role is. Not just look good - you have to be efficient and effective.
Whatever country you're in, you have to want to be in with a chance of winning.
Wherever you go, you have to go win.
