“I screwed up.”

“Change won’t come from the top, I would say. Change will come from a mobilized grass roots.

“There's no magic to the phrase radical Islam. It's a political talking point. It's not a strategy. And the reason I am careful about how I describe this threat has nothing to do with political correctness and everything to do with actually defeating extremism. Groups like ISIL and al-Qaeda want to make this war a war between Islam and America or between Islam and the west. They want to claim that they are the true leaders of over a billion Muslims around the world who reject their crazy notions. They want us to validate them by implying that they speak for those billion plus people. That they speak for Islam. That's their propaganda. That's how they recruit. And if we fall into the trap of painting all Muslims with a broad brush and imply that we are at war with an entire religion, then we are doing the terrorist's work for them.”

“It [is] that courage that Africa most desperately needs.”

“Unfortunately, too many of our schools depend on inexperienced teachers with little training in the subjects they're teaching, and too often those teachers are concentrated in already struggling schools.”

“in a climate of constant technological change.”

“What I could not support was "a dumb war, a rash war, a war based not on reason but on passion, not on principle but on politics"

“available to millions, government”

“There's nobody to guide through the process of becoming a man... to explain to them the meaning of manhood. And that's a recipe for disaster.”

“When I think about how I understand my role as citizen, setting aside being president, and the most important set of understandings that I bring to that position of citizen, the most important stuff I’ve learned I think I’ve learned from novels. It has to do with empathy. It has to do with being comfortable with the notion that the world is complicated and full of grays, but there’s still truth there to be found, and that you have to strive for that and work for that. And the notion that it’s possible to connect with some[one] else even though they’re very different from you.”

“This election is about the past vs. the future. It's about whether we settle for the same divisions and distractions and drama that passes for politics today or whether we reach for a politics of common sense and innovation, a politics of shared sacrifice and shared prosperity. There are those who will continue to tell us that we can't do this, that we can't have what we're looking for, that we can't have what we want, that we're peddling false hopes. But here is what I know. I know that when people say we can't overcome all the big money and influence in Washington, I think of that elderly woman who sent me a contribution the other day, an envelope that had a money order for $3.01 along with a verse of scripture tucked inside the envelope. So don't tell us change isn't possible. That woman knows change is possible. When I hear the cynical talk that blacks and whites and Latinos can't join together and work together, I'm reminded of the Latino brothers and sisters I organized with and stood with and fought with side by side for jobs and justice on the streets of Chicago. So don't tell us change can't happen. When I hear that we'll never overcome the racial divide in our politics, I think about that Republican woman who used to work for Strom Thurmond, who is now devoted to educating inner city-children and who went out into the streets of South Carolina and knocked on doors for this campaign. Don't tell me we can't change. Yes, we can. Yes, we can change. Yes, we can. Yes, we can heal this nation. Yes, we can seize our future. And as we leave this great state with a new wind at our backs and we take this journey across this great country, a country we love, with the message we carry from the plains of Iowa to the hills of New Hampshire, from the Nevada desert to the South Carolina coast, the same message we had when we were up and when we were down, that out of many, we are one; that while we breathe, we will hope. And where we are met with cynicism and doubt and fear and those who tell us that we can't, we will respond with that timeless creed that sums up the spirit of the American people in three simple words -- yes, we can.”

“What I would say to my successor is that it is important not just to shoot but to aim”

“At the moment that we persuade a child, any child, to cross that threshold, that magic threshold into a library, we change their lives forever, for the better.”

“It's in the misery of some unnamed slum that the next killer virus will emerge.”

“We will extend our arms to you[world] if you unclench your fists.”