You should issue demerits for tree cutting or the destruction of humus.

Models can easily become so complex that they are impenetrable, unexaminable, and virtually unalterable.

The actions of my government are not bearable. They devastate our natural resources and deprive our people. The politicians speak piously while practicing greed and divisiveness; they care nothing for the nation. I want to do more than withdraw my support. I want to tar and feather them.

A good leader sets the right goals, gets things moving, and helps us to discover that we already know what to do.

The grand jury's job is not to weigh the evidence from both sides; it is only to decide whether there is enough evidence on one side to bring a person to trial.

The sustainability revolution will be organic. It will arise from the visions, insights, experiments and actions of billions of people. The burden of making it happen is not on the shoulders of any one person or group. No one will get the credit, but everyone can contribute.

There are no separate systems. The world is a continuum. Where to draw a boundary around a system depends on the purpose of the discussion.