In recent years, we've become enamored with our own past success. Lulled into complacency by the glitter of our own achievements. We've become accustomed to the title of Military Superpower, forgetting the qualities that got us there. We've become accustomed to our economic dominance in the world, forgetting that it wasn't reckless deals and get rich quick schemes that got us where we are, but hard work and smart ideas, quality products and wise investments.

Hope is not blind optimism. It's not ignoring the enormity of the task ahead or the roadblocks that stand in our path. It's not sitting on the sidelines or shirking from a fight. Hope is that thing inside us that insists, despite all evidence to the contrary, that something better awaits us if we have the courage to reach for it, and to work for it, and to fight for it. Hope is the belief that destiny will not be written for us, but by us, by the men and women who are not content to settle for the world as it is, who have the courage to remake the world as it should be.

Today, more than ever before, science holds the key to our survival as a planet and our security and prosperity as a nation. It's time we once again put science at the top of our agenda and work to restore America's place as the world leader in science and technology.

I always enjoy watching Republicans compliment Bill Clinton now, because at the time, I'm sure he didn't feel a lot of the love.

I do not talk to the FBI directors about pending investigations [on Hillary Clinton].

I will never turn Medicare into a voucher. No American should ever have to spend their golden years at the mercy of insurance companies. They should retire with the care and dignity they have earned.

There is a wonderful book called "Gandhi's Truth," by Erik Erikson, the psychologist. It is a great book. And I remember reading that and thinking about this connection between what we think in our personal lives and how that manifests itself in our politics. Those are two books, just off the top, that I think are sort of representative of reading that I did at that time. I never get a chance to read anymore.