Putin wants to reestablish Russian greatness, not as the Cold War, but in 19th century empire terms.

Democracies don't go to war against each other, and by and large they don't sponsor terrorism. They're more likely to respect the environment and human rights and social justice. It's no accident that most of the terrorists come from non-democratic countries.

When our memories outweigh our dreams, it is then that we become old.

Ultimately, the best strategy to ensure our security and to build a durable peace is to support the advance of democracy elsewhere. Democracies don't attack each other.

America can no longer afford to get the Nobel Prizes while our competitors get the profits.

That everybody can do something, without regard to how old or young they are, rich or poor or middle class they are, how busy or not busy they are and what level skills they have. Everyone can do something. And everybody should do something. ... And if you do it, you'll be happier.

You have to make a conscious decision to change for your own well-being, and that of your family and your country.