We are defined not by our borders but by our bonds.

That bright blue ball rising over the moon's surface, containing everything we hold dear - the laughter of children, a quiet sunset, all the hopes and dreams of posterity - that's what's at stake. That's what we're fighting for. And if we remember that, I'm absolutely sure we'll succeed.

I try to make it a rule not to meddle in other people's politics.

It would be naive of me to suggest that with Russia committed militarily, as it is, to supporting what in many cases are barbarous tactics by the Assad regime to crush the opposition.

It's only when you hitch your wagon to something larger than yourself that you realize your true potential.

If American workers are being denied their right to organize and collectively bargain when I'm in the White House, I'll put on a comfortable pair of shoes myself. I'll walk on that picket line with you as President of the United States of America, because workers deserve to know that somebody is standing in their corner.

Jobs was brave enough to think differently, bold enough to believe he could change the world, and talented enough to do it.