“Suggestion, or rather Autosuggestion, is quite a new subject, and yet at the same time it is as old as the world. It is new in the sense that until now it has been wrongly studied and in consequence wrongly understood; t is old because it dates from the appearance of man on the earth. In fact autosuggestion is an instrument that we possess at birth, and in this instrument, or rather in this force, resides a marvellous and incalculable power”

Source: Autosuggestion : My method (2014), Chapter I. The reality of auto-suggestion.

Acceptance Speech http://www.washingtonpost.com/wp-srv/politics/daily/may98/goldwaterspeech.htm as the Republican Presidential candidate, San Francisco (July 1964)
Unsourced variant: Now those who seek absolute power, even though they seek it to do what they regard as good, are simply demanding the right to enforce their own version of heaven on earth, and let me remind you they are the very ones who always create the most hellish tyranny.
Context: Those who seek absolute power, even though they seek it to do what they regard as good, are simply demanding the right to enforce their own version of heaven on earth. And let me remind you, they are the very ones who always create the most hellish tyrannies. Absolute power does corrupt, and those who seek it must be suspect and must be opposed. Their mistaken course stems from false notions of equality, ladies and gentlemen. Equality, rightly understood, as our founding fathers understood it, leads to liberty and to the emancipation of creative differences. Wrongly understood, as it has been so tragically in our time, it leads first to conformity and then to despotism.

For Paris I am very busy - To Vienna a painting will be send.. .A second large painting has gone to Brussels - A [xxxx?] will offer drawings of us [drawings of him and his wife] and , at this moment they are crossing the Great Water, with destination to New York where they will be exhibited - we hope with success - Two beautiful paintings has enriched our collection again, one of Dupre and one of Rousseau. (translation from original Dutch: Fons Heijnsbroek)

(original Dutch: citaat van Hendrik Willem Mesdag, in het Nederlands:) Waarde Zwager – Zuster. Wij sukkelen ook weder de winter goed door, altijd bezig en werkende. Jammer dat de gelegenheid tot nieuw studien [maken] nog niet is gekomen het is altijd een aardige afwisseling. Nu is het altijd zee en pinken enz. [de onderwerpen in zijn schilderijen] - Voor Parijs ben ik druk bezig - Naar Weenen gaat een schilderij.. .Naar Brussel is een tweede groote schilderij gegaan – Een [xxxx?] zal teekeninge van ons [van hem en vrouw Sientje] bieden, zijn op dit oogenblik op den wijden Oeveren met bestemming naar New York waar ze geexposeerd zullen worden – naar wij hopen met succes – Een paar prachtige schilderijen een van Dupre en een van nl:Théodore RousseauRousseau onze collectie weder verrijkt

In a letter from The Hague, 15 Feb 1882 to Brother-in-law and Sister (Hindrik van Houten and Alida Cornelia Christina van Houten ten Bruggencate) from the original text in Dutch R.K.D. Archive, The Hague https://rkd.nl/explore/excerpts/707073
after 1880

Loose translation, commonly attributed to Gramsci by Slavoj Žižek, presumably formulation by Žižek (see below).
Presumably a translation from a loose French translation by Gustave Massiah; strict English with cognate terms and glosses:
Le vieux monde se meurt, le nouveau monde tarde à apparaître et dans ce clair-obscur surgissent les monstres
The old world is dying, the new world tardy (slow) to appear and in this chiaroscuro (light-dark) surge (emerge) monsters.
“ Mongo Beti, une conscience noire, africaine, universelle http://www.liberationafrique.org/imprimersans.php3?id_article=16&nom_site=Lib%C3%A9ration”, Gustave Massiah, CEDETIM, août 2002 ( archive https://web.archive.org/web/20160304061734/http://www.liberationafrique.org/imprimersans.php3?id_article=16&nom_site=Lib%C3%A9ration, 2016-03-04)
“Mongo Beti, a Black, African, Universal Conscience”, Gustave Massiah, CEDETIM, August 2002
Collected in: Remember Mongo Beti, Ambroise Kom, 2003, p. 149 https://books.google.com/books?id=6YgdAQAAIAAJ&q=%22Le+vieux+monde+se+meurt,+le+nouveau+monde+tarde+%C3%A0+appara%C3%AEtre+et+dans+ce+clair-obscur+surgissent+les+monstres%22.
Original, with literal English translation (see above):
La crisi consiste appunto nel fatto che il vecchio muore e il nuovo non può nascere: in questo interregno si verificano i fenomeni morbosi piú svariati.
The crisis consists precisely in the fact that the old is dying and the new cannot be born; in this interregnum a great variety of morbid symptoms appear.
Similar sentiments are widespread in revolutionary rhetoric; see: No, Žižek did not attribute a Goebbels quote to Gramsci http://thecharnelhouse.org/2015/07/03/no-zizek-did-not-attribute-a-goebbels-quote-to-gramsci/, Ross Wolfe, 2015-07-03
Misattributed
Source: Selections from the Prison Notebooks

2005-09, Address at Stanford University (2005)
Context: No one wants to die. Even people who want to go to heaven don’t want to die to get there. And yet death is the destination we all share. No one has ever escaped it. And that is as it should be, because Death is very likely the single best invention of Life. It is Life’s change agent. It clears out the old to make way for the new. Right now the new is you, but someday not too long from now, you will gradually become the old and be cleared away. Sorry to be so dramatic, but it is quite true.

2009, First Inaugural Address (January 2009)

Program Development by Stepwise Refinement (1971)

"One culture and the new sensibility", p. 296
Against Interpretation and Other Essays (1966)
Context: Art today is a new kind of instrument, an instrument for modifying consciousness and organizing new modes of sensibility. And the means for practicing art have been radically extended.... Painters no longer feel themselves confined to canvas and paint, but employ hair, photographs, wax, sand, bicycle tires, their own toothbrushes and socks. Musicians have reached beyond the sounds of the traditional instruments to use tampered instruments and (usually on tape) synthetic sounds and industrial noises.

Source: The rise of the western world, 1973, p. vii, Preface