Don't think of yourself as indispensable or infallible. As Charles De Gaulle said, the cemeteries of the world are full of indispensable men.

Don't say 'the White House wants.' Buildings can't want.

I am going to leave the future of Europe to the Europeans.

Those who made the decisions with imperfect knowledge will be judged in hindsight by those with considerably more information at their disposal and time for reflection.

If the staff lacks policy guidance against which to test decisions, their decisions will be random.

If there are people who yearn for the days when Saddam Hussein was in power, then I am not among them.

Learn to say 'I don't know.' If used when appropriate, it will be often.