Do I miss football in Scotland? It keeps you really alive, that's for sure. Your heartbeat fluctuates. I'm flatlining at the moment which is actually quite nice but you need to go up and down to stay alive.

Sometimes to go forward you've got to go to the depths of your own personal despair and claw yourself back. From that point, no matter what happens, you know you can do it.

I'm not saying you have to be married to be a good footballer. I'm just saying it felt strange to come to a club where there are only three members of the first-team squad that are married. You need responsibility in life.

The reason I became a manager was to have full control over training. If you are a coach, you are bound by what the manager wants you to coach. The other reason is that I just like the company of football people.

It took me 35 years of being involved at a decent level of football to become manager at a great club like Celtic.

I've been in football a long time and people have problems through debt, drugs, drink and family.

I like to be able to control which players I'm working with. Because it doesn't matter how good a coach you are if the guys you're working with think they already know it all. You need a response, you need to feel they're trying. I want players who are always striving to improve.