If you keep asking me questions, I will continue to find excuses.

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

Arsene Wenger was talking about comparisons with Johan Cruyff, a player who only comes around every 10 years and Thierry Henry is definitely one of those

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.

All the really good players I know, they all knew right from wrong. So many of them don't learn that at home nowadays.

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'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.