“We will restore science to its rightful place and wield technology's wonders to raise health care's quality and lower its cost.”

“I stand here knowing that my story is part of the larger American story, that I owe a debt to all of those who came before me, and that in no other country on Earth is my story even possible.”

“Each path to knowledge involves different rules and these rules are not interchangeable.”

“What Washington Needs is Adult Supervision.”

“Today I say to you that the challenges we face are real. They are serious and they are many. They will not be met easily or in a short span of time. But know this, America — they will be met.”

“As president, I believe that robotics can inspire young people to pursue science and engineering. And I also want to keep an eye on those robots in case they try anything.”

“We think of faith as a source of comfort and understanding but find our expressions of faith sowing division; we believe ourselves to be a tolerant people even as racial, religious, and cultural tensions roil the landscape.”

“Kalau mereka tidak berakar pada tradisi mereka sendiri, mereka tak akan mampu menghargai kebudayaan orang lain.”

“And to all those who have wondered if Americas beacon still burns as bright - tonight we proved once more that the true strength of our nation comes not from our the might of our arms or the scale of our wealth, but from the enduring power of our ideals: democracy, liberty, opportunity, and unyielding hope. For that is the true genius of America - that America can change. Our union can be perfected. And what we have already achieved gives us hope for what we can and must achieve tomorrow.”

“I realized that in some unspoken, still tentative way, she and I were already becoming a family.”

“perhaps that’s how any love begins, impulses and cloudy images that allow us to break across our solitude, and then, if we’re lucky, are finally transformed into something firmer.”

“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.”

“The question we ask today is not whether our government is too big or too small, but whether it works”

“I had nothing to escape from except my own inner doubt.”

“It was Jefferson, not some liberal judge in the sixties, who called for a wall between church and state—and if we have declined to heed Jefferson’s advice to engage in a revolution every two or three generations, it’s only because the Constitution itself proved a sufficient defense against tyranny.”