It's always difficult if you're coming into a new club and new league, especially the English one. It's a very demanding one, can be a very tough one.

At Ajax, we have a certain philosophy that is sometimes more important than winning - the development of players.

I share a special bond with Ajax. I think we are a special club. And we're known for our philosophy around the world.

I always said I wanted to finish my career back at Ajax, but I didn't think I was going to play for so long at such a high level, so that's not going to happen now.

All of the great leaders have had one characteristic in common: it was the willingness to confront unequivocally the major anxiety of their people in their time. This, and not much else, is the essence of leadership.

Leadership is getting someone to do what they don't want to do, to achieve what they want to achieve.

Leadership does take work. And it should. If you aspire to be a leader, you ought to treat leadership as a craft, you ought to become a student of it, and you ought to work at it. And if you're not willing to work at it, well, you get what you give.

In Britain, you do your job. When you do an American TV show, there is a sense of being one with the crew, and there is a leadership element, which was a learning curve for me because it is very different culturally. In Britain, you just do it, leave and say, 'Thanks.'