If we can't meet with our friends, I don't know how we're going to lead the world in terms of dealing with critical issues like terrorism.

It was basic research in the photoelectric field-in the photoelectric effect that would one day lead to solar panels. It was basic research in physics that would eventually produce the CAT scan. The calculations of today's GPS satellites are based on the equations that Einstein put to paper more than a century ago.

We won't apologise for our way of life, nor will we weaver in its defence, and for those who seek to advance their aims by inducing terror and slaughtering innocents, we say to you now that our spirit is stronger and cannot be broken, you cannot outlast us, and we will defeat you.

We must build a world free of unnecessary barriers, stereotypes, and discrimination. ... policies must be developed, attitudes must be shaped, and buildings and organizations must be designed to ensure that everyone has a chance to get the education they need and live independently as full citizens in their communities.

If the Court finds that there is not a state interest in discriminating and showing moral disapproval of homosexuality then we can't stop equal marriage rights.

My only agenda for the next two years is the same as the one I’ve had since the day I swore an oath on the steps of this Capitol — to do what I believe is best for America.

We were very effective, and I was very effective, in shaping public opinion around my campaigns. But there were big stretches, while governing, where even though we were doing the right thing, we weren't able to mobilize public opinion firmly enough behind us to weaken the resolve of the Republicans to stop opposing us or to cooperate with us. And there were times during my presidency where I lost the PR battle.