You should strive to find happiness every day and not believe that it comes at the end of the journey.

I pledge that I have no intention of raising taxes in my second term.

I wanted to continue to be active on those things that I cared about when I was president where I could still have an impact.

On Earth Day I made a commitment to reduce our emissions of greenhouse gases to 1990 levels by the year 2000. And I asked for a blueprint on how to achieve this goal. In concert with all other nations, we simply must halt global warming. It is a threat to our health, to our ecology, and to our economy. I know that the precise magnitude and patterns of climate change cannot be fully predicted. But global warming clearly is a growing, long-term threat with profound consequences. And make no mistake about it, it will take decades to reverse.

The world has never truly had to develop an ethic of interdependence rooted in our common humanity. And if we do it, the 21st century will be the most interesting, exciting, peaceful era in history.

Two-thirds of the Iranian people would like to be reconciled with the West. They don't like the fanaticism of the governing religious council. It's the only place in the world where the last six elections have been won by the more progressive candidate, two for president, two for the mayors, two for the parliament. So most people there are sympathetic to the world we Americans want to build, whether we're Republicans or Democrats. On the other hand, almost everybody there wants them to have nuclear power. They see it as a status symbol, and a sense of their own security.

I'm sorry, could you please tell me what the definition of the word "is" is?