“After our country had been established, enlarged from sea to sea, and was dedicated to popular government, the next great task was to demonstrate the permanency of our Union and to extend the principle of freedom to all inhabitants of our land. The master of this supreme accomplishment was Abraham Lincoln. Above all other national figures, he holds the love of his fellow countrymen. The work which Washington and Jefferson began, he extended to its logical conclusions.”

“The principles upon which this nation was founded are those upon which its survival, no less than its prosperity, depend. These are the principles upon which we believe our freedom and prosperity as individuals, and that of our children depend. These principles are simple and familiar enough for anyone to understand who wishes to understand. Selfish motives, miseducation, or ideological blindness may lead some to deny or disparage them. But nothing can obscure their shining truth… Lincoln at Gettysburg said that the nation, at its birth, had been dedicated to the proposition that all men are created equal. Earlier, Lincoln had said that the proposition of equality was the 'central idea' of the founding, from which all its minor thoughts emanated.”

Harry V. Jaffa (1918–2015) American historian and collegiate professor

“His mortal frame has vanished, but his spirit increases with the increasing years the richest legacy of the greatest century. Men show by what they worship what they are. It is no accident that before the great example of American manhood, our people stand with respect and reverence. In Abraham Lincoln is revealed our ideal; the hope of our country fulfilled. He was the incarnation of what America was to be. Through him, the Almighty bestowed upon the nation a new birth of freedom that this dear land of ours might be returned to the health of its fathers.”

Calvin Coolidge (1872–1933) American politician, 30th president of the United States (in office from 1923 to 1929)

“What America needs is to hold to its ancient and well-charted course. Our country was conceived in the theory of local self-government. It has been dedicated by long practice to that wise and beneficent policy. It is the foundation principle of our system of liberty. It makes the largest promise to the freedom and development of the individual. Its preservation is worth all the effort and all the sacrifice that it may cost.”

Calvin Coolidge (1872–1933) American politician, 30th president of the United States (in office from 1923 to 1929)

“Had Abraham Lincoln died from any of the numerous ills to which flesh is heir; had he reached that good old age of which his vigorous constitution and his temperate habits gave promise; had he been permitted to see the end of his great work; had the solemn curtain of death come down but gradually, we should still have been smitten with a heavy grief, and treasured his name lovingly. But dying as he did die, by the red hand of violence, killed, assassinated, taken off without warning, not because of personal hate, for no man who knew Abraham Lincoln could hate him, but because of his fidelity to union and liberty, he is doubly dear to us, and his memory will be precious forever. Fellow citizens, I end, as I began, with congratulations. We have done a good work for our race today. In doing honor to the memory of our friend and liberator, we have been doing highest honors to ourselves and those who come after us. We have been fastening ourselves to a name and fame imperishable and immortal; we have also been defending ourselves from a blighting scandal. When now it shall be said that the colored man is soulless, that he has no appreciation of benefits or benefactors; when the foul reproach of ingratitude is hurled at us, and it is attempted to scourge us beyond the range of human brotherhood, we may calmly point to the monument we have this day erected to the memory of Abraham Lincoln.”

Frederick Douglass (1818–1895) American social reformer, orator, writer and statesman

“Our country is the world, our countrymen are all mankind. We love the land of our nativity, only as we love all other lands. The interests, rights, and liberties of American citizens are no more dear to us than are those of the whole human race. Hence we can allow no appeal to patriotism, to revenge any national insult or injury.”

William Lloyd Garrison (1805–1879) American journalist

“He represents a noble and courageous dedication to the service of freedom. He never sought for personal aggrandizement, but under heavy temptation remained loyal to the great Cause. He possessed a character that will abide with us through the generations. He loved his fellowmen, and believed in the ultimate triumph of self-government. But he did not consider France had reached a point where representative democracy would be a success. He was practical. Like Washington, he refused a crown. But while he believed Washington performed a great service in accepting the Presidency of America, he believed he had performed an equally great service in rejecting the Presidency of France. He approved the establishment of our republican institutions, and hoped they would one day be a model for the government of his own country. He recognized the value of native institutions. So, while he was loyal to freedom, he was likewise loyal to the Crown. In moderation, in the gradual evolution of government and society, he perceived the strongest defense against both reaction and revolution, and the greatest hope for permanent progress.”

Calvin Coolidge (1872–1933) American politician, 30th president of the United States (in office from 1923 to 1929)

“This is not only his birthday, but the anniversary of the farewell reception extended to him at the White House by President Adams during his last visit to our country. This day not only recalls his youth and his dashing figure in our Revolution, but it reminds us of the venerable man, half a century later, held in love and admiration by two countries for the sacrifices he had made in the service of liberty.”

Calvin Coolidge (1872–1933) American politician, 30th president of the United States (in office from 1923 to 1929)

“The union of these four Presidents carved on the face of the everlasting hills of South Dakota will constitute a distinctly national monument. It will be decidedly American in conception, in its magnitude, in its meaning and altogether worthy of our Country. No one can look upon it understandingly without realizing that it is a picture of hope fulfilled. Its location will be significant. Here in the heart of the continent, on the side of a mountain which probably no white man had ever beheld in the days of Washington, in territory which was acquired by the action of Jefferson, which remained an unbroken wilderness beyond the days of Lincoln, which was especially beloved by Roosevelt, the people of the future will see history and art combined to portray the spirit of patriotism. They will know that the figure of these Presidents has been placed here because by following the truth they built for eternity. The fundamental principles which they represented have been wrought into the very being of our Country. They are steadfast as these ancient hills.”

Calvin Coolidge (1872–1933) American politician, 30th president of the United States (in office from 1923 to 1929)

“Perhaps it was better for Mr. Lincoln's happiness that he died when he did. Had he lived, he would likely have been involved in bitter political feuds, owing to his liberal opinions in regard to the reconstruction of the States. He was of too sensitive a nature not to feel the shafts that would have been hurled at him by those whom he thought to be his friends, and he would not likely have been permitted to carry out his ideas. As it was, he died a martyr to a great cause, and venerated by all those who loved the Union; and while the names of many who held high places in the State will be forgotten, the memory of Abraham Lincoln will live in the hearts of his countrymen while the art of printing exists by which his name can be handed down to posterity.”

David Dixon Porter (1813–1891) United States Navy admiral