If we want to make the best products, we also have to invest in the best ideas... Every dollar we invested to map the human genome returned $140 to our economy... Today, our scientists are mapping the human brain to unlock the answers to Alzheimer's... Now is not the time to gut these job-creating investments in science and innovation. Now is the time to reach a level of research and development not seen since the height of the Space Race.

But at a time when our discourse has become so sharply polarized - at a time when we are far too eager to lay the blame for all that ails the world at the feet of those who think differently than we do - it's important for us to pause for a moment and make sure that we are talking with each other in a way that heals, not a way that wounds.

If you're 54 or 55, you might want to listen because this will affect you. The idea, which was originally presented by Congressman Ryan, your running mate, is that we would give a voucher to seniors and they could go out in the private marketplace and buy their own health insurance.

We did not come to fear the future. We came here to shape it.

I am looking forward to getting out of the bubble. I am glad that I'm leaving this place at a relatively young age, at 55. So I have the opportunity for a second maybe even a third act in a way that I think would be tougher if I were, you know, the age of some presidents when they left.

Even when folks are hitting you over the head, you can't stop marching. Even when they're turning the hoses on you, you can't stop.

The Russians can't change us or significantly weaken us. They are a smaller country. They are a weaker country. Their economy doesn't produce anything that anybody wants to buy, except oil and gas and arms. They don't innovate. But they can impact us if we lose track of who we are.