“We Americans write our own history. And the chapters of which we're proudest are the ones where we had the courage to change.”

2014, Statement on Cuban policy (December 2014)

Victory speech after winning New Jersey and other states Tuesday night (7 June 2016) – TIME transcript http://time.com/4360872/donald-trump-new-jersey-victory-speech-transcript/
2010s, 2016, June

2000s, 2006, State of the Union (January 2006)

Presidential campaign (April 12, 2015 – 2016), 2016 Democratic National Convention (July 28, 2016)
Context: Tonight, we've reached a milestone in our nation's march toward a more perfect union: the first time that a major party has nominated a woman for President. Standing here as my mother's daughter, and my daughter's mother, I'm so happy this day has come. Happy for grandmothers and little girls and everyone in between. Happy for boys and men, too – because when any barrier falls in America, for anyone, it clears the way for everyone. When there are no ceilings, the sky's the limit. So let's keep going, until every one of the 161 million women and girls across America has the opportunity she deserves. Because even more important than the history we make tonight, is the history we will write together in the years ahead. Let's begin with what we're going to do to help working people in our country get ahead and stay ahead.

Source: The Country of the Pointed Firs (1896), Ch. 19

2013, "Let Freedom Ring" Ceremony (August 2013)

Source: A Room of One's Own (1929), Ch. 6, pp. 117-118
Context: My belief is that if we live another century or so — I am talking of the common life which is the real life and not of the little separate lives which we live as individuals — and have five hundred a year each of us and rooms of our own; if we have the habit of freedom and the courage to write exactly what we think; if we escape a little from the common sitting-room and see human beings not always in their relation to each other but in relation to reality; and the sky, too, and the trees or whatever it may be in themselves; if we look past Milton's bogey, for no human being should shut out the view; if we face the fact, for it is a fact, that there is no arm to cling to, but that we go alone and that our relation is to the world of reality and not only to the world of men and women, then the opportunity will come and the dead poet who was Shakespeare's sister will put on the body which she has so often laid down. Drawing her life from the lives of the unknown who were her forerunners, as her brother did before her, she will be born. As for her coming without that preparation, without that effort on our part, without that determination that when she is born again she shall find it possible to live and write her poetry, that we cannot expect, for that would be impossible. But I maintain that she would come if we worked for her, and that so to work, even in poverty and obscurity, is worth while.