What Clinton did with Lewinsky was despicable but was no threat to the nation. That he lied about it repeatedly and to the public is a reason for us to cease to trust him and for him to resign.

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

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

A system is a set of things people, cells, molecules, or whatever interconnected in such a way that they produce their own pattern of behavior over time... The system, to a large extent, causes its own behavior.

How do we appreciate the good without letting it be the enemy of the perfect? How do we keep a step in the right direction from becoming a stopping point? How do we get beyond shades of insipid light green?

There have been high crimes and misdemeanors, but they have been committed by the special prosecutor and the Congress, not the president.

The European nations take climate change very seriously.