Tony Blair is a very able politician; he's perhaps one of the best of his generation. He made a major contribution in many areas, but in Iraq I believe he got it wrong. He got it wrong.

Achieving the MDGs is not optional; it is an essential investment in a safer, more human and prosperous world

I think over time you learn to know a bit more about yourself - you develop a certain amount of self-insight and self-awareness, and you know what you can absorb, and what you cannot; what gets to you and what doesn't.

UN peacekeeping operations are now increasingly complex and multi-dimensional, going beyond monitoring a ceasefire to actually bringing failed States back to life, often after decades of conflict. The blue helmets and their civilian colleagues work together to organize elections, enact police and judicial reform, promote and protect human rights, conduct mine-clearance, advance gender equality, achieve the voluntary disarmament of former combatants, and support the return of refugees and displaced people to their homes.

Revolution by its nature can not be overly programmed or directed. There are so many forces at work that you don't know where and how it all ends.

It's always a difficult time to be secretary general.

It's not that easy to quit. When you look back in the American system it is very rare that people quit on issues of principle.