"My life has been football, football, football. I couldn't change. I've had opportunities in the past to consider other things, to go into television, for example, but each time I realised that I couldn't live without football.
"My spirit and enthusiasm is exactly as it was 20 years ago. It might be the same 20 years from now. What I do accept is that you need fitness and energy to do the job I do. That's not guaranteed for anyone.
"I also realise you need a kind of animal force. To motivate people you need the hunter's animal instinct. You must want to win. When you're a young manager your animal instinct is strong but your knowledge is small.
"With age the balance changes - the animal instinct shrinks and the wisdom becomes dominant.
"Then you get to the stage when you have only wisdom. That's when you have to say goodbye. Then, of course, you might lose wisdom also. When that happens you have a problem!"
