“If we sit with Negroes at our tables, if we attend social functions with them as our social equals, if we disregard segregation in all other relations, is it then possible that we maintain it fixedly in the marriage of the South's Saxon sons and daughters? The answer must be "No." By the absolute denial of social equality to the Negro, the barriers between the races are firm and strong. But if the middle wall of the social partition should be broken down, then the mingling of the tides of life would surely begin. It would be a slow process, but the result would be the same. And though the process be gradual, it would be none the less irresistible and inevitable. The lower strata of the white population would probably feel the first effects, and within the foreseeable future the middle and upper classes would be invaded. Then, the Southern White race, the Southern Caucasian, would be irretrievably doomed.”

[McClarey, Donald R, Father John Ireland and the Fifth Minnesota, The American Catholic, 2012-08-23, https://the-american-catholic.com/2012/08/23/father-john-ireland-and-the-fifth-minnesota/, 2018-02-04] [Source for quote doesn't list primary source., February 2018]

In a statement arguing that would have been practically impossible to prevent Hartfield's lynching
1919

Source: Take Your Choice, Separation or Mongrelization (1946), Chapter Four: Southern Segregation and the Color Line.

Political Science for Civil Services Main Examination (2010)

Day of Affirmation Address (1966)
Context: The help and the leadership of South Africa or of the United States cannot be accepted if we, within our own country or in our relationships with others, deny individual integrity, human dignity, and the common humanity of man. If we would lead outside our borders, if we would help those who need our assistance, if we would meet our responsibilities to mankind, we must first, all of us, demolish the borders which history has erected between men within our own nations — barriers of race and religion, social class and ignorance.
Our answer is the world's hope; it is to rely on youth. The cruelties and the obstacles of this swiftly changing planet will not yield to obsolete dogmas and outworn slogans. It cannot be moved by those who cling to a present which is already dying, who prefer the illusion of security to the excitement and danger which comes with even the most peaceful progress. This world demands the qualities of youth: not a time of life but a state of mind, a temper of the will, a quality of the imagination, a predominance of courage over timidity, of the appetite for adventure over the love of ease.

Sixth Lincoln-Douglas debate https://cwcrossroads.wordpress.com/2011/01/18/race-and-slavery-north-and-south-some-logical-fallacies/#comment-47553, (13 October 1860), Quincy, Illinois
1860s
Context: You know that in his Charleston speech, an extract from which he has read, he declared that the negro belongs to an inferior race; is physically inferior to the white man, and should always be kept in an inferior position. I will now read to you what he said at Chicago on that point. In concluding his speech at that place, he remarked, 'My friends, I have detained you about as long as I desire to do, and I have only to say let us discard all this quibbling about this man and the other man-this race and that race, and the other race being inferior, and therefore they must be placed in an inferior position, discarding our standard that we have left us. Let us discard all these things, and unite as one people throughout this land until we shall once more stand up declaring that all men are created equal'. Thus you see, that when addressing the Chicago Abolitionists he declared that all distinctions of race must be discarded and blotted out, because the negro stood on an equal footing with the white man; that if one man said the Declaration of Independence did not mean a negro when it declared all men created equal, that another man would say that it did not mean another man; and hence we ought to discard all difference between the negro race and all other races, and declare them all created equal.

Source: The Voice of Destruction (1940), pp. 192-193

Speech to the United States Senate http://www.charlesmphipps.net/the-real-lynching-party/.

This is from a fictional speech by Lincoln which occurs in The Clansman : An Historical Romance of the Ku Klux Klan (1905) by Thomas Dixon, Jr.. On some sites this has been declared to be something Lincoln said "soon after signing" the Emancipation Proclamation, but without any date or other indications of to whom it was stated, and there are no actual historical records of Lincoln ever saying this.
Misattributed