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.Collection: Patience
It turns out I share a birthday with Jose Mourinho. He is exactly 10 years older than me.Collection: Birthday
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.
My teams have always been dominant about having the ball but having the ball to create opportunities. That's always been the clear way of my work.
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.
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.
I'm not arrogant enough to think that I will be in a job through anything. Any manager will tell you that you have to win games, and you have to get results. You have to perform.
What I learned was it does not matter how much support you have in the boardroom, from the directors, the executives: you have to get results, and you have to win.
A winning model would mean trying to get the best possible players that you can, at whatever age they are; it doesn't matter.
I think sometimes you can want to win too much, and the focus comes away from what allows you to win.
When I was at Liverpool, I asked about Van Dijk when he was at Groningen and then at Celtic. But I was told he wouldn't be for us at the time. Van Dijk could have jumped from Celtic to a Liverpool.
He's a big player, and the big players score the big goals and make the big contributions in the big games. That's what determines a great player. That's what Steven Gerrard is.
I always like the players to be within 10 to 15 metres of each other. When the attacking players try what I am asking them to do, and it breaks down, there are players close enough to then go and win the ball back and counter press the game.
You can have X amount of pounds in your bank every month, but if you're not happy, and you're not finding peace in what you're doing, it doesn't really matter.
I love the Premier League, the quality of the players, the quality of the coaches. There are great challenges. But there are arms and legs flying off managers down there.
Celtic are one of the great clubs of the world. There's a pressure here that's different. You have to win every game. There's not a club in England that has that.
What you have in Scotland is an unpredictability with surfaces - and I've already said you don't get good games on artificial turf - and that can affect performances and results.
My decision was that after nearly three years at Celtic - with everything we'd achieved and the success we'd had on the pitch, the improvements off the pitch - then it was time to move on to my next challenge.