From the speech "Plymouth, Labor Day" (1 September 1919), as printed in Have Faith in Massachusetts: A Collection of Speeches and Messages (2nd Ed.), Houghton Mifflin, pp. 200-201 : see link above.
1910s, Plymouth, Labor Day (1919)

“It is not here necessary to examine in detail the causes which led to the American Revolution. In their immediate occasion they were largely economic. The colonists objected to the navigation laws which interfered with their trade, they denied the power of Parliament to impose taxes which they were obliged to pay, and they therefore resisted the royal governors and the royal forces which were sent to secure obedience to these laws. But the conviction is inescapable that a new civilization had come, a new spirit had arisen on this side of the Atlantic more advanced and more developed in its regard for the rights of the individual than that which characterized the Old World. Life in a new and open country had aspirations which could not be realized in any subordinate position. A separate establishment was ultimately inevitable. It had been decreed by the very laws of human nature. Man everywhere has an unconquerable desire to be the master of his own destiny.”

Calvin Coolidge

1920s, Speech on the Anniversary of the Declaration of Independence (1926)

“When dealing with the distribution of powers between the General Government and the States, Chief Justice Marshall declared: 'When the American people created a national legislature, with certain enumerated powers, it was neither necessary nor proper to define the powers retained by the States. Those powers proceed, not from the people of America, but from the people of the several States, and remain after the adoption of the Constitution what they were before, except in so far as they may be abridged by that instrument.”

Calvin Coolidge

1920s, The Reign of Law (1925)

“Men and women, in and of themselves, are desirable. There can not be too many inhabitants of the right kind, distributed in the right place. Great work, there is for each and every one of them to perform. The country needs all the intelligence, and skill, and strength of mind and body it can get. whether we draw such from those within our gates, or from those without, seeking entrance. But since we are confronted by the clamor of multitudes who desire the opportunity offered by American life, we must face the situation unflinchingly, determined to relinquish not one iota of our obligations to others, yet not so sentimental as to overlook our obligations to ourselves.”

Calvin Coolidge

1920s, Whose Country Is This? (1921)

“To meet these necessities the Government has been developing a water power project at Muscle Shoals to be equipped to produce nitrogen for explosives and fertilizer. It is my opinion that the support of agriculture is the chief problem to consider in connection with this property. It could by no means supply the present needs for nitrogen, but it would help and its development would encourage bringing other water powers into like use.”

Calvin Coolidge

1920s, Second State of the Union Address (1924)

“We are in agreement with him in his conviction that the laborer must be protected 'against the burdens of the good-for-nothing'. We want no such additions to our population as those who prey upon our institutions or our property. America has, in the popular mind, been an asylum for those who have been driven from their homes in foreign countries because of various forms of political and religious oppression. But America can not afford to remain an asylum after such people have passed the portals and begun to share the privileges of our institutions.”

Calvin Coolidge

1920s, Whose Country Is This? (1921)

“But it is unnecessary for me to do more than mention a few of the representative forms of recreation. We all know that their name is legion, and that different tastes require different activities. I am not trying to recommend one above another, but I am trying to point out the national value which would accrue if there were an organized, instructed, and persistent effort to bring these benefits to the people at large. It can not be that our country is making a great outlay for playgrounds in our schools, for athletic fields in our colleges, for baseball fields in our cities, for recreation parks in our metropolitan districts, for State and national forest reservations, unless these all represent an opportunity for a real betterment of the life of the people. These are typically American in all their aspects. They minister directly to the welfare of all our inhabitants.”

Calvin Coolidge

1920s, The Democracy of Sports (1924)

“Another matter before the Congress is legislation affecting the labor sections of the transportation act. Much criticism has been directed at the workings of this section and experience has shown that some useful amendment could be made to these provisions.”

Calvin Coolidge

1920s, Second State of the Union Address (1924)

“In other periods of depression it has always been possible to see some things which were solid and upon which you could base hope, but as I look about, I now see nothing to give ground for hope — nothing of man. But there is still religion, which is the same yesterday, today, and forever. That continues as a solid basis for hope and courage.”

Calvin Coolidge

Conversation with Charles Andrews (1 January 1933), quoted in Coolidge: An American Enigma (2000).
1930s

“That statement can not be too much emphasized. The country's growth has compelled the Federal establishment to exceed by far the Government plants of even the greatest States. With this growth in physical extent, in revenue, in personnel, there has inevitably been the suggestion that the Federal Government was overshadowing the States. Yet the State governments deal with far more various and more intimate concerns of the people than does the National Government. All the operations of the minor civil divisions, parishes, wards, school districts, towns, cities, counties, and the like, are dependencies of the State. The maintenance of order through police, the general business of enforcing law, is left to the States. So is education.”

Calvin Coolidge

1920s, The Reign of Law (1925)

“We meet to celebrate the birthday of America. The coming of a new life always excites our interest. Although we know in the case of the individual that it has been an infinite repetition reaching back beyond our vision, that only makes it the more wonderful. But how our interest and wonder increase when we behold the miracle of the birth of a new nation. It is to pay our tribute of reverence and respect to those who participated in such a mighty event that we annually observe the fourth day of July. Whatever may have been the impression created by the news which went out from this city on that summer day in 1776, there can be no doubt as to the estimate which is now placed upon it. At the end of 150 years the four corners of the earth unite in coming to Philadelphia as to a holy shrine in grateful acknowledgement of a service so great, which a few inspired men here rendered to humanity, that it is still the preeminent support of free government throughout the world.”

Calvin Coolidge

1920s, Speech on the Anniversary of the Declaration of Independence (1926)

“Numbered among our population are some 12,000,000 colored people. Under our Constitution their rights are just as sacred as those of any other citizen. It is both a public and a private duty to protect those rights. The Congress ought to exercise all its powers of prevention and punishment against the hideous crime of lynching, of which the negroes are by no means the sole sufferers, but for which they furnish a majority of the victims.”

Calvin Coolidge

1920s, First State of the Union Address (1923)