As a youngster I was a great dreamer, reading many books of adventure and walking lonely miles with my head in the clouds.

Nobody climbs mountains for scientific reasons. Science is used to raise money for the expeditions, but you really climb for the hell of it.

When I was 50 years old, I actually decided to draw up a list of half a dozen things that I really hadn't done very well, and I was going to make efforts to improve. One of them was skiing, and I really did become a very much better skier.

It was wrong if there was a man suffering altitude problems and was huddled under a rock, just to lift your hat, say 'good morning' and pass on by, he said. Human life is far more important than just getting to the top of a mountain.

Strong motivation is the most important factor in getting you to the top

If the going is tough and the pressure is on, If the reserves of strength have been drained and the summit is still not in sight, then the quality to seek in the person is neither great strength nor quickness of hand, but rather a resolute mind firmly set on its purpose that refuses to let its body slack or rest.

I was certainly seriously emotionally affected [ when Louise Hillary and Belinda Hillary died], but we were building the hospital at the time and I decided that the only thing to do was to carry on and complete the hospital - and it was a jolly good hospital too, I might say. So I really did it by working and working on the things that Louise and I had been working on.