“Terrorist attacks can shake the foundations of our biggest buildings, but they cannot touch the foundation of America. These acts shatter steel, but they cannot dent the steel of American resolve.”

Present at the Creation: My Years in the State Department (1969), Principles

Yahoo News article October 10, 2003 http://in.news.yahoo.com/031010/137/28diu.html This statement is identical to one made by President George W. Bush on October 9, 2003 and is likely to have been a mis-reporting of Wolfowitz quoting Bush's statement.
Misattributed

Source: Nonviolent Communication: A Language of Life

Source: The Hour of the Star

"Physics and Reality" in the Journal of the Franklin Institute Vol. 221, Issue 3 (March 1936), Pages 349-382
1930s
Context: It has often been said, and certainly not without justification, that the man of science is a poor philosopher. Why then should it not be the right thing for the physicist to let the philosopher do the philosophizing? Such might indeed be the right thing to do at a time when the physicist believes he has at his disposal a rigid system of fundamental laws which are so well established that waves of doubt can't reach them; but it cannot be right at a time when the very foundations of physics itself have become problematic as they are now. At a time like the present, when experience forces us to seek a newer and more solid foundation, the physicist cannot simply surrender to the philosopher the critical contemplation of theoretical foundations; for he himself knows best and feels more surely where the shoe pinches. In looking for an new foundation, he must try to make clear in his own mind just how far the concepts which he uses are justified, and are necessities.

1940s, Address accepting the Presidency of the CIO (1952)
Just sit down on a doorstep with a peasant in a village of Northern India and take on the task of trying to explain to him why America, conceived in freedom and dedicated to the proposition that all men are created equal, a nation that can split the atom, that can make a pursuit ship go three times as fast as sound and yet, in this twentieth century, we can't live together in brotherhood and we continue to discriminate against Negroes. It will tax your ingenuity, and you will give them no answers. You can only give them excuses. And excuses are not good enough, if we are going to win the struggle of freedom in the world.
Source: Address accepting the Presidency of the Congress of Industrial Organizations, Atlantic City, New Jersey, December 4, 1952, as quoted in Walter P Reuther: Selected Papers (1961), by Henry M. Christman, p. 51

Speech in Portsmouth, NH http://georgewbush-whitehouse.archives.gov/news/releases/2003/10/20031009-7.html (October 9, 2003) These lines have sometimes been attributed to Paul Wolfowitz, who was reported to have said them the next day, perhaps quoting the President's speech.
2000s, 2003

The Art of Persuasion

1960s, I Have A Dream (1963)
Source: I Have a Dream: Writings and Speeches That Changed the World
Context: The whirlwinds of revolt will continue to shake the foundations of our nation until the bright day of justice emerges. But there is something that I must say to my people who stand on the warm threshold which leads into the palace of justice. In the process of gaining our rightful place we must not be guilty of wrongful deeds. Let us not seek to satisfy our thirst for freedom by drinking from the cup of bitterness and hatred. We must forever conduct our struggle on the high plane of dignity and discipline. We must not allow our creative protest to degenerate into physical violence. Again and again we must rise to the majestic heights of meeting physical force with soul force.