I think my strengths perhaps are that I'm determined. I may not be the best climber in the world, but I do like to sort of succeed and so that tends to drive me on, as it were, and I don't give up too easily.

Human life is far more important than just getting to the top of a mountain.

Motivation is the single most important factor in any sort of success.

We shared a philosophy together [with June Hillary]. We believed very strongly in the welfare of helping other people, particularly the Third World people.

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

Good planning is important. I've also regarded a sense of humor as one of the most important things on a big expedition. When you're in a difficult or dangerous situation, or when you're depressed about the chances of success, someone who can make you laugh eases the tension.

It's not the moutain we conquer but ourselves.