Every nation has a moral obligation to safeguard the future.

Science has a culture that is inherently cautious and that is normally not a bad thing. You could even say conservative, because of the peer review process and because the scientific method prizes uncertainty and penalises anyone who goes out on any sort of a limb that is not held in place by abundant and well-documented evidence.

In a time of social fragmentation, vulgarity becomes a way of life. To be shocking becomes more important - and often more profitable - than to be civil or creative or truly original.

The American people overwhelmingly want our troops out of Iraq. They want the federal government to take real and immediate action to combat global warming and to significantly expand support for stem cell research. Democrats almost unanimously support the people's wishes onthese crucial issues. Republicans don't.

I don't have the illusion that there's any position or role in the world with as much potential for bringing about change as that of president of the United States.

The rule of reason is the true sovereign in the American system.

I have always been fascinated with those who try to look over the horizon and see things that are coming at us.