“To discriminate against a thoroughly upright citizen because he belongs to some particular church, or because, like Abraham Lincoln, he has not avowed his allegiance to any church, is an outrage against that liberty of conscience which is one of the foundations of American life. You are entitled to know whether a man seeking your suffrages is a man of clean and upright life, honorable in all of his dealings with his fellows, and fit by qualification and purpose to do well in the great office for which he is a candidate; but you are not entitled to know matters which lie purely between himself and his Maker.”

Sermon at St. Augustine Catholic Church (1890)

198 U.S. at 79.
1900s, Lochner v. New York, 198 U.S. 45 (1905)

1910s, Address to the Knights of Columbus (1915)
Context: The one absolutely certain way of bringing this nation to ruin, of preventing all possibility of its continuing to be a nation at all, would be to permit it to become a tangle of squabbling nationalities, an intricate knot of German-Americans, Irish-Americans, English-Americans, French-Americans, Scandinavian-Americans or Italian-Americans, each preserving its separate nationality, each at heart feeling more sympathy with Europeans of that nationality, than with the other citizens of the American Republic. The men who do not become Americans and nothing else are hyphenated Americans; and there ought to be no room for them in this country. The man who calls himself an American citizen and who yet shows by his actions that he is primarily the citizen of a foreign land, plays a thoroughly mischievous part in the life of our body politic. He has no place here; and the sooner he returns to the land to which he feels his real heart allegiance, the better it will be for every good American. There is no such thing as a hyphenated American who is a good American. The only man who is a good American is the man who is an American and nothing else.

Source: Nightwood (1936), Ch. 6 : Where the Tree Falls

1910s, Address to the Knights of Columbus (1915)
Context: One of the most important things to secure for him is the right to hold and to express the religious views that best meet his own soul needs. Any political movement directed against anybody of our fellow- citizens because of their religious creed is a grave offense against American principles and American institutions. It is a wicked thing either to support or to oppose a man because of the creed he professes. This applies to Jew and Gentile, to Catholic and Protestant, and to the man who would be regarded as unorthodox by all of them alike. Political movements directed against men because of their religious belief, and intended to prevent men of that creed from holding office, have never accomplished anything but harm. This was true in the days of the ‘Know-Nothing’ and Native-American parties in the middle of the last century; and it is just as true to-day. Such a movement directly contravenes the spirit of the Constitution itself. Washington and his associates believed that it was essential to the existence of this Republic that there should never be any union of Church and State; and such union is partially accomplished wherever a given creed is aided by the State or when any public servant is elected or defeated because of his creed. The Constitution explicitly forbids the requiring of any religious test as a qualification for holding office. To impose such a test by popular vote is as bad as to impose it by law. To vote either for or against a man because of his creed is to impose upon him a religious test and is a clear violation of the spirit of the Constitution.

The trial of Charles B. Reynolds for blasphemy (1887)

1910s, Address to the Knights of Columbus (1915)

Source: Sociology For The South: Or The Failure Of A Free Society (1854), p. 69

1910s, Address to the Knights of Columbus (1915)
Context: We should meet this situation by on the one hand seeing that these immigrants get all their rights as American citizens, and on the other hand insisting that they live up to their duties as American citizens. Any discrimination against aliens is a wrong, for it tends to put the immigrant at a disadvantage and to cause him to feel bitterness and resentment during the very years when he should be preparing himself for American citizenship. If an immigrant is not fit to become a citizen, he should not be allowed to come here. If he is fit, he should be given all the rights to earn his own livelihood, and to better himself, that any man can have. Take such a matter as the illiteracy test; I entirely agree with those who feel that many very excellent possible citizens would be barred improperly by an illiteracy test. But why do you not admit aliens under a bond to learn to read and write within a certain time? It would then be a duty to see that they were given ample opportunity to learn to read and write and that they were deported if they failed to take advantage of the opportunity.