Quotes of famous people

Abraham Lincoln: Proclamation of a Day of Fasting (12 August 1861) http://www.historyplace.com/lincoln/proc-3.htm
1860s

Attributed to "an American President" in Ármin Vámbéry (1884), All the Year Round. It more likely originates in a spoof testimonial that Artemus Ward (Charles Farrar Browne) wrote in an advertisement in 1863:
Posthumous attributions

Sometimes attributed to Lincoln since a 1950 speech of Douglas MacArthur citing him as its author, this is actually from a poem by Ella Wheeler Wilcox.
Misattributed

Speech in reply to Senator Stephen Douglas in the Lincoln-Douglas debates http://www.bartleby.com/251/1003.html of the 1858 campaign for the U.S. Senate, at Chicago, Illinois (10 July 1858)
1850s, Lincoln–Douglas debates (1858)
Context: My friend has said to me that I am a poor hand to quote Scripture. I will try it again, however. It is said in one of the admonitions of our Lord, "As your Father in Heaven is perfect, be ye also perfect." The Saviour, I suppose, did not expect that any human creature could be perfect as the Father in Heaven; but He said, "As your Father in Heaven is perfect, be ye also perfect." He set that up as a standard; and he who did most toward reaching that standard, attained the highest degree of moral perfection. So I say in relation to the principle that all men are created equal, let it be as nearly reached as we can. If we cannot give freedom to every creature, let us do nothing that will impose slavery upon any other creature. Let us then turn this Government back into the channel in which the framers of the Constitution originally placed it. Let us stand firmly by each other. If we do not do so we are turning in the contrary direction, that our friend Judge Douglas proposes — not intentionally — as working in the traces tend to make this one universal slave nation. He is one that runs in that direction, and as such I resist him. My friends, I have detained you about as long as I desired 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. My friends, I could not, without launching off upon some new topic, which would detain you too long, continue to-night. I thank you for this most extensive audience that you have furnished me to-night. I leave you, hoping that the lamp of liberty will burn in your bosoms until there shall no longer be a doubt that all men are created free and equal.

Source: Speech at a Republican Banquet, Chicago, Illinois, December 10, 1856 http://quod.lib.umich.edu/l/lincoln/lincoln2/1:413?rgn=div1;view=fulltext; see Roy P. Basler, ed., The Collected Works of Abraham Lincoln, vol. 2 (New Brunswick, N.J.: Rutgers University Press, 1953), p. 532

1850s, The House Divided speech (1858)
Context: Of strange, discordant, and even hostile elements, we gathered from the four winds, and formed and fought the battle through, under the constant hot fire of a disciplined, proud, and pampered enemy. Did we brave all them to falter now? — now, when that same enemy is wavering, dissevered, and belligerent? The result is not doubtful. We shall not fail — if we stand firm, we shall not fail. Wise counsels may accelerate, or mistakes delay it, but, sooner or later, the victory is sure to come.

Often misquoted as: "I have found that most people are about as happy as they make up their minds to be." or "People are just as happy as they make up their minds to be."
This quote is not found in the various Lincoln sources which can be searched online (e.g. Gutenberg). Niether does Lincoln appear more generally to use the phrase "making up {one's} mind". The saying was first quoted, ascribed to Lincoln but with no source given, in 1914 by Frank Crane and several times subsequently by him in altered versions. It was later quoted in How to Get What You Want (1917) by Orison Swett Marden (Thomas Y. Crowell Company, 1917), 74, again without source. Alternative versions quoted are: "I have found that most people are about as happy as they make up their minds to be" and "People are just as happy as they make up their minds to be."


Source: https://quoteinvestigator.com/2012/10/20/happy-minds/#:~:text=%E2%80%9CPeople%20are%20about%20as%20happy,up%20their%20minds%20to%20be.%E2%80%9D&text=Remember%20Lincoln's%20saying%20that%20%E2%80%9Cfolks,up%20their%20minds%20to%20be.%E2%80%9D

Curiously in later books Crane, e.g. Four Minute Essays, 1919, Adventures in Common Sense, 1920, "21", 1930, Crane mentions other routes to happiness and does not again use this quote.

Marden used a great many quotes in his writings, without giving sources. Whilst sources for many of the quotes can be found, this is not true for all. For instance he mentions another story in which Lincoln says "Madam, you have not a peg to hang your case on"; this also does not seem to found in Lincoln sources.

Source: 1860s, Speech at Hartford (1860)
Context: So with John Brown and Harper's Ferry. They charge it upon the Republican party and ignominiously fail in all attempts to substantiate the charge. Yet they go on with their bushwhacking, the pack in full cry after John Brown.

Source: 1860s, Second State of the Union address (1862)

The origins of this quote are unknown. At least two sources can be traced back, but these sources date back to the 1940 years; long time after Lincon's death.
Source 1: The 2003 "Masonic Historiology" from Allotter J. McKowe contains on page 55 (page 55 is dated on Jan. 11, 1944) the poem " What Is a Boy? http://books.google.de/books?id=K5CHWRttt-gC&pg=PA55&dq=desk" from an unknown author. The poem reads:
:: He is a person who is going to carry on what you have started.
:: He is to sit right where you are sitting and attend when you are gone to those things you think are so important.
:: You may adopt all the policies you please, but how they will be carried out depends on him.
:: Even if you make leagues and treaties, he will have to manage them.
:: He is going to sit at your desk in the Senate, and occupy your place on the Supreme Bench.
:: He will assume control of your cities, states and nations.
:: He is going to move in and take over your prisons, churches, schools, universities and corporations.
:: All your work is going to be judged and praised or condemned by him.
:: Your reputation and your future are in his hands.
:: All you work is for him, and the fate of the nations and of humanity is in his hands. Quotes about life http://www.quotesaboutlifee.com/2012/04/best-quotes-on-life-best-sayings-on.html
:: So it might be well to pay him some attention.
Source 2: The newspaper "The Florence Times" from Florence, Alabama (Volume 72 - Number 120) contains in its Wednesday afternoon edition from October 30, 1940 a statement from a Dr. Frank Crane. The entitled "What is a Boy?" statement http://news.google.com/newspapers?nid=1842&dat=19401030&id=yx8sAAAAIBAJ&sjid=I7oEAAAAIBAJ&pg=3738,3720511 reads:
Disputed

Noah Brooks, scribe for the Sacramento Union, writing in the Harper’s Weekly for July 1865, 3 months after Lincoln had died, reported that the Lincoln once said this, at an unspecified date; as reported in "Did Abraham Lincoln Actually Say That Obama Quote?" by James M. Cornelius, The Daily Beast (9 August 2012) http://www.thedailybeast.com/articles/2012/09/08/did-abraham-lincoln-actually-say-that-obama-quote.html
Posthumous attributions