Every time I go to Africa, I feel like I hit true north. There is a depth of feeling that I have for the continent, in the richness of the people, the suffering , but also the transcendent joy that is there - it's like nowhere else on the planet.

A tree is a wonderful living organism which gives shelter, food, warmth and protection to all living things. It even gives shade to those who wield an axe to cut it down

The care of the Earth is our most ancient and most worthy, and after all our most pleasing responsibility. To cherish what remains of it and to foster its renewal is our only hope.

...if we want to meet the obligations of our civilization and our culture which are to create communities for our children that provide them with the same opportunities for dignity and enrichment as the communities that our parents gave us, we've got to start by protecting that infrastructure; the air that we breathe, the water that we drink, the landscapes that enrich us.

We live on a finite planet. We have finite resources, and we're running out of good, arable land.

From the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of higher animals, directly follows.