“Thus it was that America sank further and further into Americanism. Vast wealth and industry, and also brilliant invention, were concentrated upon puerile ends. In particular the whole of American life was organized around the cult of the powerful individual, that phantom ideal which Europe herself had only begun to outgrow in her last phase. Those Americans who wholly failed to realize this ideal, who remained at the bottom of the social ladder, either consoled themselves with hopes for the future, or stole symbolical satisfaction by identifying themselves with some popular star, or gloated upon their American citizenship, and applauded the arrogant foreign policy of their government. Those who achieved power were satisfied so long as they could merely retain it, and advertise it uncritically in the conventionally self-assertive manners.”

1920s, The Press Under a Free Government (1925)
Context: It can safely be assumed that self-interest will always place sufficient emphasis on the business side of newspapers, so that they do not need any outside encouragement for that part of their activities. Important, however, as this factor is, it is not the main element which appeals to the American people. It is only those who do not understand our people, who believe that our national life is entirely absorbed by material motives. We make no concealment of the fact that we want wealth, but there are many other things that we want very much more. We want peace and honor, and that charity which is so strong an element of all civilization. The chief ideal of the American people is idealism. I cannot repeat too often that America is a nation of idealists. That is the only motive to which they ever give any strong and lasting reaction. No newspaper can be a success which fails to appeal to that element of our national life. It is in this direction that the public press can lend its strongest support to our Government. I could not truly criticize the vast importance of the counting room, but my ultimate faith I would place in the high idealism of the editorial room of the American newspaper.

1967, p. xxiii
The Modern Corporation and Private Property. 1932/1967

2011, Address on interventions in Libya (March 2011)
Context: I believe that this movement of change cannot be turned back, and that we must stand alongside those who believe in the same core principles that have guided us through many storms: our opposition to violence directed at one’s own people; our support for a set of universal rights, including the freedom for people to express themselves and choose their leaders; our support for governments that are ultimately responsive to the aspirations of the people.
Born, as we are, out of a revolution by those who longed to be free, we welcome the fact that history is on the move in the Middle East and North Africa, and that young people are leading the way. Because wherever people long to be free, they will find a friend in the United States. Ultimately, it is that faith — those ideals — that are the true measure of American leadership.

On the Clinton-Lewinsky scandal in a column titled "Why Clinton Must Resign or Be Impeached" — https://www.bustle.com/p/mike-pence-quotes-about-impeachment-reveal-what-he-really-thinks-of-presidents-having-affairs-10026765 (circa late 1990s)

1910s, The Progressives, Past and Present (1910)

Speech at the Chamber of Commerce, New York City, New York (2 January 1896)
Context: What is the rule of honor to be observed by a power so strongly and so advantageously situated as this Republic is? Of course I do not expect it meekly to pocket real insults if they should be offered to it. But, surely, it should not, as our boyish jingoes wish it to do, swagger about among the nations of the world, with a chip on its shoulder, shaking its fist in everybody's face. Of course, it should not tamely submit to real encroachments upon its rights. But, surely, it should not, whenever its own notions of right or interest collide with the notions of others, fall into hysterics and act as if it really feared for its own security and its very independence.
As a true gentleman, conscious of his strength and his dignity, it should be slow to take offense. In its dealings with other nations it should have scrupulous regard, not only for their rights, but also for their self-respect. With all its latent resources for war, it should be the great peace power of the world. It should never forget what a proud privilege and what an inestimable blessing it is not to need and not to have big armies or navies to support. It should seek to influence mankind, not by heavy artillery, but by good example and wise counsel. It should see its highest glory, not in battles won, but in wars prevented. It should be so invariably just and fair, so trustworthy, so good tempered, so conciliatory, that other nations would instinctively turn to it as their mutual friend and the natural adjuster of their differences, thus making it the greatest preserver of the world's peace.
This is not a mere idealistic fancy. It is the natural position of this great republic among the nations of the earth. It is its noblest vocation, and it will be a glorious day for the United States when the good sense and the self-respect of the American people see in this their "manifest destiny." It all rests upon peace. Is not this peace with honor? There has, of late, been much loose speech about "Americanism." Is not this good Americanism? It is surely today the Americanism of those who love their country most. And I fervently hope that it will be and ever remain the Americanism of our children and our children's children.

“True Americanism” (1915).
Extra-judicial writings

As quoted in Manuscripts: speeches and messages of Calvin Coolidge, 1895–1924, the Massachusetts State Library, George Fingold Library, Boston.
1920s, Speech to the the Republican Commercial Travelers' Club (1920)

Congressional testimony (2007)