I think if you've managed Celtic or Rangers you can go on to be Prime Minister of Great Britain, it's that hard.

I want players who are always striving to improve.

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

The reality, ... is that I need to win games of football. That's where the pressure and the sleepless nights come from. There's a fantasy pressure with this job but none of that matters. I need to make this team into a good unit, need to take it forward, give it a change of pace, need to get it younger and to use the experience of the lads we've got here. I need Lennon and Sutton and people like that to go and show how you handle being a Celtic player.

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.

I've seen teams spend £150 million and get nowhere near the Champions League. It has taken Manchester City a billion to get there. There are no guarantees.

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