All is connected ... no one thing can change by itself.

We are now heading down a centuries-long path toward increasing the productivity of our natural capital - the resource systems upon which we depend to live - instead of our human capital.

The most unrealistic person in the world is the cynic, not the dreamer.

We assume that everything's becoming more efficient, and in an immediate sense that's true; our lives are better in many ways. But that improvement has been gained through a massively inefficient use of natural resources.

The first rule of sustainability is to align with natural forces, or at least not try to defy them

Business is correct to defend its right to act in order to produce a vigorous and engaging prosperity. But it is wrong if it forgets that this freedom can only be experienced within the discipline of social responsibility.

Working for the earth is not a way to get rich, it is a way to be rich.