Great weight should be given to the judgment of professionals on what information, if disclosed, would harm national security.

When I was at the CIA I asked my civilian advisory board to tackle some tough questions. Among the toughest: In a political culture that every day demands more transparency and more public accountability from every aspect of national life, could American intelligence continue to survive and succeed? That jury is still out.

There is no part of the executive branch that more exists on the outer edge of executive prerogative than the American intelligence community - the intelligence community, CIA, covert action. My literal responsibility as director of CIA with regard to covert action was to inform the Congress - not to seek their approval, to inform.

Intelligence is often viewed as a profession that steals secrets and then knits those secrets together for policymakers in order to inform their judgments.

Many people believe that introversion is about being antisocial, and that's really a misperception. Because actually it's just that introverts are differently social. So they would prefer to have a glass of wine with a close friend as opposed to going to a loud party full of strangers.

One of the big ways in which I felt my own writing life shaped by recovery had to do with my relationship to other people's stories. And one of the things I loved most about recovery was the way in which, in meetings and through fellowship, you are constantly kind of paying attention to lives outside of your own.

General benevolence, but not general friendship, made a man what he ought to be.

The time I have already spent at Harvard has been a stimulating experience, and I look forward to developing my relationship and activities with the students, faculty and friends of the Harvard Business School community.