Joseph Staline citations

le 13 mai 1935 à Pierre Laval, lui proposant de faire preuve de diplomatie envers le l'État du Vatican.[Le petit livre de - les grandes phrases, Gilles Guilleron, First Editions, 2010, 117]
Vatican

It is mistakenly attributed to Stalin: there is no evidence that he ever said or wrote something like that.

This phrase from the novel "Children of the Arbat" (1987) by Анатолий Наумович Рыбаков (1911 — 1998). As Stalin said about the execution of military experts in Tsaritsyn in 1918: "Death solves all problems. No person and no problem. " Later, in his «Роман-воспоминание» (1997), Рыбаков wrote that the phrase Stalin "possibly from someone heard, perhaps, he came up with." This was Stalin's principle. I just, it briefly formulated."

Often attributed to Stalin, there is not a single source which show that Stalin said this at any given time. There is only one source outside the blogosphere which attributes the quote to Stalin, but does not provide any evidence for the attribution. That source is the book Quotations for Public Speakers : A Historical, Literary, and Political Anthology (2001), p. 121 by the former US senator Robert Torricelli.
Misattributed

Variante: Those who vote decide nothing. Those who count the vote decide everything.

Often attributed to Stalin and Marx, according to the book, They Never Said It (1989), p. 64, the phrase derives from a rumour that Lenin said this to one of his close associates, Grigori Zinoviev, not long after a meeting of the Politburo in the early 1920s, but there is no evidence that he ever did. It has also been believed that Lenin may have expressed that the profit motive cannot be undone in that "If we were to hang the last capitalist, another would suddenly appear to sell us the rope". Experts on the Soviet Union reject the rope quote as spurious. However, it is established that Lenin did remark on the same underlying theme (even if not in reference to rope), namely, that capitalists in their addiction to high profits could not help themselves from selling things to a socialist state, even if it was against their own long-term interests by strengthening an enemy; Edvard Radzinsky covers it in his discussion of Lenin's comments on the "deaf-mutes" in Radzinsky's biography of Stalin.
Misattributed

Anarchism or Socialism (1906)
Contexte: We are not the kind of people who, when the word "anarchism" is mentioned, turn away contemptuously and say with a supercilious wave of the hand: "Why waste time on that, it's not worth talking about!" We think that such cheap "criticism" is undignified and useless.
Nor are we the kind of people who console themselves with the thought that the Anarchists "have no masses behind them and, therefore, are not so dangerous." It is not who has a larger or smaller "mass" following today, but the essence of the doctrine that matters. If the "doctrine" of the Anarchists expresses the truth, then it goes without saying that it will certainly hew a path for itself and will rally the masses around itself. If, however, it is unsound and built up on a false foundation, it will not last long and will remain suspended in mid-air. But the unsoundness of anarchism must be proved.
Some people believe that Marxism and anarchism are based on the same principles and that the disagreements between them concern only tactics, so that, in the opinion of these people, no distinction whatsoever can be drawn between these two trends.
This is a great mistake.
We believe that the Anarchists are real enemies of Marxism. Accordingly, we also hold that a real struggle must be waged against real enemies.

Report to the Seventeenth Party Congress on the Work of the Central Committee of the C.P.S.U. (B.) https://www.marxists.org/reference/archive/stalin/works/1934/01/26.htm (January 26, 1934)
Stalin's speeches, writings and authorised interviews
Contexte: Still others think that war should be organised by a "superior race," say, the German "race," against an "inferior race," primarily against the Slavs; that only such a war can provide a way out of the situation, for it is the mission of the "superior race" to render the "inferior race" fruitful and to rule over it. Let us assume that this queer theory, which is as far removed from science as the sky from the earth, let us assume that this queer theory is put into practice. What may be the result of that? It is well known that ancient Rome looked upon the ancestors of the present-day Germans and French in the same way as the representatives of the "superior race" now look upon the Slav races. It is well known that ancient Rome treated them as an "inferior race," as "barbarians," destined to live in eternal subordination to the "superior race," to "great Rome", and, between ourselves be it said, ancient Rome had some grounds for this, which cannot be said of the representatives of the "superior race" of today. (Thunderous applause.) But what was the upshot of this? The upshot was that the non-Romans, i. e., all the "barbarians," united against the common enemy and brought Rome down with a crash. The question arises: What guarantee is there that the claims of the representatives of the "superior race" of today will not lead to the same lamentable results? What guarantee is there that the fascist literary politicians in Berlin will be more fortunate than the old and experienced conquerors in Rome? Would it not be more correct to assume that the opposite will be the case?

Anarchism or Socialism (1906)
Contexte: We are not the kind of people who, when the word "anarchism" is mentioned, turn away contemptuously and say with a supercilious wave of the hand: "Why waste time on that, it's not worth talking about!" We think that such cheap "criticism" is undignified and useless.
Nor are we the kind of people who console themselves with the thought that the Anarchists "have no masses behind them and, therefore, are not so dangerous." It is not who has a larger or smaller "mass" following today, but the essence of the doctrine that matters. If the "doctrine" of the Anarchists expresses the truth, then it goes without saying that it will certainly hew a path for itself and will rally the masses around itself. If, however, it is unsound and built up on a false foundation, it will not last long and will remain suspended in mid-air. But the unsoundness of anarchism must be proved.
Some people believe that Marxism and anarchism are based on the same principles and that the disagreements between them concern only tactics, so that, in the opinion of these people, no distinction whatsoever can be drawn between these two trends.
This is a great mistake.
We believe that the Anarchists are real enemies of Marxism. Accordingly, we also hold that a real struggle must be waged against real enemies.

At the funeral of his first wife, Kato Svanidze, on 25 November 1907, as quoted in Young Stalin (2007) by Simon Sebag Montefiore, p. 193
Contemporary witnesses

Remark to Nikita Khrushchev and Anastas Mikoyan as quoted in "Khrushchev: Notes from a Forbidden Land", http://www.time.com/time/magazine/article/0,9171,904531-4,00.html Time, 30 November 1970, citing the publication of an installment of Khrushchev's reminiscences in Life that week.
Contemporary witnesses

Anarchism or Socialism (1906)
Contexte: We are not the kind of people who, when the word "anarchism" is mentioned, turn away contemptuously and say with a supercilious wave of the hand: "Why waste time on that, it's not worth talking about!" We think that such cheap "criticism" is undignified and useless.
Nor are we the kind of people who console themselves with the thought that the Anarchists "have no masses behind them and, therefore, are not so dangerous." It is not who has a larger or smaller "mass" following today, but the essence of the doctrine that matters. If the "doctrine" of the Anarchists expresses the truth, then it goes without saying that it will certainly hew a path for itself and will rally the masses around itself. If, however, it is unsound and built up on a false foundation, it will not last long and will remain suspended in mid-air. But the unsoundness of anarchism must be proved.
Some people believe that Marxism and anarchism are based on the same principles and that the disagreements between them concern only tactics, so that, in the opinion of these people, no distinction whatsoever can be drawn between these two trends.
This is a great mistake.
We believe that the Anarchists are real enemies of Marxism. Accordingly, we also hold that a real struggle must be waged against real enemies.

Interview http://www.rationalrevolution.net/special/library/cc835_44.htm with H. G. Wells (September 1937)
Stalin's speeches, writings and authorised interviews

Address to the Reception of Directors and Stakhanovites of the Metal Industry and the Coal Mining Industry http://www.marxists.org/reference/archive/stalin/works/1937/10/29.htm (29 October 1937)
Stalin's speeches, writings and authorised interviews
Contexte: The confidence of the people in the worker-directors of the economy is a great thing, Comrades. The leaders come and go, but the people remain. Only the people are immortal, everything else is ephemeral. That is why it is necessary to appreciate the full value of the confidence of the people.

Report to the Seventeenth Party Congress on the Work of the Central Committee of the C.P.S.U. (B.) https://www.marxists.org/reference/archive/stalin/works/1934/01/26.htm (January 26, 1934)
Stalin's speeches, writings and authorised interviews
Contexte: Still others think that war should be organised by a "superior race," say, the German "race," against an "inferior race," primarily against the Slavs; that only such a war can provide a way out of the situation, for it is the mission of the "superior race" to render the "inferior race" fruitful and to rule over it. Let us assume that this queer theory, which is as far removed from science as the sky from the earth, let us assume that this queer theory is put into practice. What may be the result of that? It is well known that ancient Rome looked upon the ancestors of the present-day Germans and French in the same way as the representatives of the "superior race" now look upon the Slav races. It is well known that ancient Rome treated them as an "inferior race," as "barbarians," destined to live in eternal subordination to the "superior race," to "great Rome", and, between ourselves be it said, ancient Rome had some grounds for this, which cannot be said of the representatives of the "superior race" of today. (Thunderous applause.) But what was the upshot of this? The upshot was that the non-Romans, i. e., all the "barbarians," united against the common enemy and brought Rome down with a crash. The question arises: What guarantee is there that the claims of the representatives of the "superior race" of today will not lead to the same lamentable results? What guarantee is there that the fascist literary politicians in Berlin will be more fortunate than the old and experienced conquerors in Rome? Would it not be more correct to assume that the opposite will be the case?

Radio Address https://www.marxists.org/reference/archive/stalin/works/1941/07/03.htm (3 July 1941)
Stalin's speeches, writings and authorised interviews

from "The Social-Democratic View of the National Question", 1904 (aged 26) http://www.marxists.org/reference/archive/stalin/works/1904/09/01.htm
Stalin's speeches, writings and authorised interviews

In Russian: Я считаю, что совершенно неважно, кто и как будет в партии голосовать; но вот что чрезвычайно важно, это - кто и как будет считать голоса.
Said in 1923, as quoted in The Memoirs of Stalin's Former Secretary http://www.panrus.com/books/details.php?langID=1&bookID=5905 (1992) by Boris Bazhanov [Saint Petersburg] (Борис Бажанов. Воспоминания бывшего секретаря Сталина). (Text online in Russian) http://lib.ru/MEMUARY/BAZHANOW/stalin.txt.
Variant (loose) translation: The people who cast the votes decide nothing. The people who count the votes decide everything.
Contemporary witnesses

Speech "The Elections in St. Petersburg" (January 1913) http://marx2mao.com/Stalin/ESP13.html
Stalin's speeches, writings and authorised interviews

from "From (the) Editors" (1901) an article in a socialist newspaper-- Stalin was one of the editors (aged 22) http://www.marxists.org/reference/archive/stalin/works/1901/09/x01.htm#*
Stalin's speeches, writings and authorised interviews
Contexte: From the point of view of the onlooker, the question of the existence of a Georgian newspaper in general, and the question of its content and trend in particular, may seem to settle themselves naturally and simply: the Georgian Social-Democratic movement is not a separate, exclusively Georgian, working-class movement with its own separate programme; it goes hand in hand with the entire Russian movement and, consequently, accepts the authority of the Russian Social-Democratic Party—hence it is clear that a Georgian Social-Democratic newspaper should be only a local organ that deals mainly with local questions and reflects the local movement. But behind this reply lurks a difficulty which we cannot ignore and which we shall inevitably encounter. We refer to the language difficulty. While the Central Committee of the Russian Social-Democratic Party is able to explain all general questions with the aid of the all-Party newspaper and leave it to the regional committees to deal only with local questions, the Georgian newspaper finds itself in a difficulty as regards content. The Georgian newspaper must simultaneously play the part of an all-Party and of a regional, or local organ. As the majority of Georgian working-class readers cannot freely read the Russian newspaper, the editors of the Georgian newspaper have no right to pass over those questions which the all-Party Russian newspaper is discussing, and should discuss. Thus, the Georgian newspaper must inform its readers about all questions of principle concerning theory and tactics. At the same time it must lead the local movement and throw proper light on every event, without leaving a single fact unexplained, and providing answers to all questions that excite the local workers. The Georgian newspaper must link up and unite the Georgian and Russian militant workers The newspaper must inform its readers about everything that interests them at home, in Russia and abroad.

Stalin's article "Our purposes" Pravda #1, (22 January 1912)
Stalin's speeches, writings and authorised interviews

"Anti-Semitism: Reply to an inquiry of the Jewish News Agency in the United States" (12 January 1931)
Stalin's speeches, writings and authorised interviews
Contexte: National and racial chauvinism is a vestige of the misanthropic customs characteristic of the period of cannibalism. Anti-Semitism, as an extreme form of racial chauvinism, is the most dangerous vestige of cannibalism. Anti-semitism is of advantage to the exploiters as a lightning conductor that deflects the blows aimed by the working people at capitalism. Anti-Semitism is dangerous for the toilers, for it is a false track which diverts them from the proper road and leads them into the jungle. Hence, Communists, as consistent internationalists, cannot but be irreconcilable and bitter enemies of anti-Semitism. In the U. S. S. R., anti-Semitism is strictly prosecuted as a phenomenon hostile to the Soviet system. According to the laws of the U. S. S. R. active anti-Semites are punished with death.

Telegram to government aviation production plant superintendents by Stalin in the autumn of 1941, warning them to produce more Il-2 Sturmovik ground attack aircraft for national defense.

Stalin's speeches, writings and authorised interviews
Contexte: You have let down our country and our Red Army. You have the nerve not to manufacture IL-2s until now. Our Red Army now needs IL-2 aircraft like the air it breathes, like the bread it eats. Shenkman produces one IL-2 a day and Tretyakov builds one or two MiG-3s daily. It is a mockery of our country and the Red Army. I ask you not to try the government's patience, and demand that you manufacture more ILs. This is my final warning.

Said in April, 1945, as quoted in Conversations with Stalin (1963) by Milovan Djilas
Contemporary witnesses
Contexte: This war is not as in the past; whoever occupies a territory also imposes on it his own social system. Everyone imposes his own system as far as his army can reach. It cannot be otherwise. If now there is not a communist government in Paris, this is only because Russia has no an army which can reach Paris in 1945.

https://www.marxists.org/reference/archive/stalin/works/1946/03/x01.htmInterview to “Pravda” Correspondent Concerning Mr. Winston Churchill’s Speech at Fulton; March, 1946
Stalin's speeches, writings and authorised interviews
Contexte: As is known, the Government of the State in Britain at the present time is in the hands of one party, the Labour Party, and the opposition parties are deprived of the right to participate in the Government of Britain. That Mr. Churchill calls true democracy. Poland, Romania, Yugoslavia, Bulgaria and Hungary are administered by blocs of several parties—from four to six parties—and the opposition, if it is more or less loyal, is secured the right of participation in the Government. That Mr. Churchill describes as totalitarianism, tyranny and police rule. Why? On what grounds? Don’t expect a reply from Mr. Churchill. Mr. Churchill does not understand in what a ridiculous position he puts himself by his outcry about “totalitarianism, tyranny and police rule.

This actually comes from the novel Children of the Arbat (1987) by Anatoly Rybakov. In his later book The Novel of Memories ( In Russian http://www.sakharov-center.ru/asfcd/auth/auth_pages.xtmpl?Key=18637&page=307) Rybakov admitted that he had no sources for such a statement.
Misattributed

As quoted in The Memoirs of Stalin's former secretary (1992) by Boris Bazhanov [Saint Petersburg] (in Russian) http://lib.ru/MEMUARY/BAZHANOW/stalin.txt
Contemporary witnesses