You're not human if you don't feel fear. But I've learnt to treat fear as an emotion that sharpens me. It's there to give me that edge for what I have to do.

Life doesn't reward the naturally clever or strong but those who can learn to fight and work hard and never quit.

I do see a lot of the hard end of ecology, and my feeling is that we live on a super-exciting planet but a super-fragile one.

I joined the Army at 19 as a soldier and spent about four and a half years with them. Then I broke my back in a freefall parachuting accident and spent a year in rehabilitation back in the U.K.

Many great people over the centuries have depended on their faith- it is a sign of great strength to need Jesus in your life.

There is little faith involved in setting out on a journey where the destination is certain and every step in between has been mapped in detail. Bravery, trust, is about leaving camp in the dark, when we do not know the route ahead and cannot be certain we will ever return.

I don't like expeditions where it is a total lottery whether you live or die. You have to keep those sort of good luck cards for rare occasions!