We are all born bonded to nature; that's why we put depictions of flowers and forests, rather than bulldozers or log piles, on our walls.

In securing the future of the planet, we secure happiness for ourselves. One of the aims of the Greens is to turn around the tide of pessimism amongst the young people of the world.

Behind every successful man there's a lot of unsuccessful years.

Exxon, Coca-Cola, BHP Billiton and News Corporation have much more say in organising the global agenda than the planet's 5 billion mature-age voters without a ballot box.

I am not a conventionally religious man, but in the wilderness I have come closest to finding myself and knowing the universe and accepting God - by which I mean accepting all that I don't know.

Whereas our common past, out of Africa, saw a global diaspora of humankind, our common future depends on a global coming together and consensus, resulting in a more equitable distribution of the Earth's largesse. When Africa, which gave us the wealth of life, has that debt returned, the world will have come of age.

One-time Guinness World Record holder for Yo-Yo endurance.