I had changed from being a mathematician to a practicing scientist. I was increasingly embarassed that I could no longer follow some of the more modern branches of pure mathematics.

Looking through the list of earlier Nobel laureates, I note a large number with whom I became acquainted and with whom I interacted during those years as they passed through Cambridge.

I was a close observer of the developments in molecular biology.

At the age of 12, I developed an intense interest in mathematics. On exposure to algebra, I was fascinated by simultaneous equations and read ahead of the class to the end of the book.

From an early age I was told that I was expected to do more than continue to run a small business. Education was important and seen as a way of moving forward.

I am delighted to have had students, friends and colleagues in so many nations and to have learned so much of what I know from them. This Nobel Award honours them all.

On my return to Pittsburgh, I resolved to go back to the fundamental problems of electronic structure that I had contemplated abstractly many years earlier.

Leaving England was a painful decision, and we still have some regrets about it. However, at that time, the research environment for theoretical chemistry was clearly better in the U.S.

Life with a scientist who is often changing jobs and is frequently away at meetings and on lecture tours is not easy. Without a secure home base, I could not have made much progress.

In the war, most young men were inducted into the armed forces at the age of 17. A group of students was permitted to attend university before taking part in wartime research projects.

Our children were mostly brought up and educated in the Churchill suburb east of Pittsburgh. Each summer, we took them back to England for an extended period.

I saw a dead bird flying through a broken sky. I heard it, and it said, "The world will never understand.

In America any boy may become President, and I suppose it's just one of the risks he takes.

Lincoln, they used to talk about him almost as bad as they talk about me. So democracy has never been for the faint of heart.

Some are pre-taped interviews because maybe we can't get that person live or maybe we're not sure it's going to work out right so we tape it an hour in advance.

Our shows are packed with laughter and light-hearted songs to lift the listener from their everyday life. We encourage the audience to participate in any way.

We must all wage an intense, lifelong battle against the constant downward pull. If we relax, the bugs and weeds of negativity will move into the garden and take away everything of value.

I believe that men are here to grow themselves into the best good that they can be - at least, this is what I want to do.

In fact, all kinds of men, and not merely architects, can recognize a good piece of work.

I had a prejudice against the British until I discovered that fifty percent of them were female.

If I'd wanted to be an individual, I'd have taken up tennis.