Stepping onto an Olympic podium was such a unique moment, and I guess it would be one of the proudest of my career. I had dreamed about it since I was a kid.

I’m proud any time that I see a toxic chemical process, something that produces toxic waste or requires precious metals, which have to be mined at terrible environmental degradation costs — I’m proud when I see that replaced with a clean, efficient biological process that doesn’t produce those things. And we have to do that a million times over in order to move away from our addiction to this old-fashioned chemistry that we do.

Never betraying a friend in prison.

I would say the discovery of the hydrothermal vents off the Galápagos Islands. That really turned science upside down. Until that time, there were a lot of things we didn’t know about the ocean. We didn’t know why it was salty. We didn’t know why it had the chemistry that it had.

At the end he asked me if I would like to go into the Army. I thought it would be splendid to command an Army, so I said 'Yes' at once: and immediately I was taken at my word. ... I was told later that he had only come to the conclusion that I was not clever enough to go to the Bar. However that may be, the toy soldiers turned the current of my life.

You cannot tell from appearances how things will go. Sometimes imagination makes things out far worse than they are; yet without imagination not much can be done. Those people who are imaginative see many more dangers than perhaps exist; certainly many more than will happen; but then they must also pray to be given that extra courage to carry this far-reaching imagination.

Having bought the colours, an easel, and a canvas, the next step was to begin. But what a step to take! The palette gleamed with beads of colour; fair and white rose the canvas; the empty brush hung poised, heavy with destiny, irresolute in the air. My hand seemed arrested by a silent veto.

At this school I was allowed to learn things which interested me: French, History, lots of Poetry by heart, and above all Riding and Swimming. The impression of those years makes a pleasant picture in my mind, in strong contrast to my earlier schoolday memories.

But the years 1895 to 1900 which are the staple of this story exceed in vividness, variety and exertion anything I have known—except of course the opening months of the Great War. When I look back upon them I cannot but return my sincere thanks to the high gods for the gift of existence. All the days were good and each day better than the other. Ups and downs, risks and journeys, but always the sense of motion, and the illusion of hope.

Come on now all you young men, all over the world. You are needed more than ever now to fill the gap of a generation shorn by the War. You have not an hour to lose. You must take your places in life's fighting line. Twenty to twenty-five! These are the years! Don't be content with things as they are. 'The earth is yours and the fulness thereof'. Enter upon your inheritance, accept your responsibilities. Raise the glorious flags again, advance them upon the new enemies, who constantly gather upon the front of the human army, and have only to be assaulted to be overthrown. Don't take No for an answer. Never submit to failure.