The last time I checked, the Constitution said, 'of the people, by the people and for the people.' That's what the Declaration of Independence says.

Even as people take pride in their national independence, we know we are becoming more and more interdependent.

When I was in England, I experimented with marijuana a time or two, and I didn’t like it, and I didn’t inhale, and I never tried again.

We should, all of us, be filled with gratitude and humility for our present progress and prosperity. We should be filled with awe and joy at what lies over the horizon. And we should be filled with absolute determination to make the most of it.

It turns out that advancing equal opportunity and economic empowerment is both morally right and good economics. Why? Because discrimination, poverty and ignorance restrict growth. We know that investments in education, infrastructure and scientific and technological research increase growth. They increase good jobs, and they create new wealth for all of us.

If you voluntarily quit in the face of adversity, you'll wonder about it for the rest of your life.

Nothing big ever came from being small.