“The future is called "perhaps," which is the only possible thing to call the future. And the important thing is not to allow that to scare you.”
Source: "The Past, the Present and the Perhaps," http://books.google.com/books?id=mTRaAAAAMAAJ&q=%22The+future+is+called+perhaps+which+is+the+only+possible+thing+to+call+the+future+And+the+important+thing+is+not+to+allow+that+to+scare+you%22&pg=PA7#v=onepage introduction to Orpheus Descending (1957)
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Tennessee Williams 139
American playwright 1911–1983Related quotes

“The fascists of the future will be called anti-fascists.”
According to research, it has been attributed to Churchill since the 21st century. A similar variation has been attributed to Huey Long a year after he expired, but it’s unclear if he said it either. Source: http://quoteinvestigator.com/2017/03/04/anti-fascism/ Source: http://paleofuture.gizmodo.com/9-quotes-from-winston-churchill-that-are-totally-fake-1790585636 Variants: The Fascists of the future will be the anti-fascists. The Swiss author François Bondy attributed a similar quote to Ignazio Silone: This reminded me of what Ignazio Silone said in 1945 soon after he returned to Italy from his Zurich exile: "The Fascism of tomorrow will never say 'I am Fascism.' It will say: 'I am anti-Fascism.'" Alternatively quoted as: When I met him in Geneva on the day of his scheduled return home after the long exile in Switzerland, Silone said abruptly: "If at a future moment fascism will return, it will not be so stupid as to say: 'I am fascism.' It will say: 'I am antifascism.'" Source: François Bondy (1976), "European Notebook", Encounter, vol. 47, p. 51. Source: François Bondy (1979), "Ignazio Silone: In Memoriam", The Washington Quarterly, vol. 2, issue 2.
Source: http://quoteinvestigator.com/2017/03/04/anti-fascism/
Source: http://paleofuture.gizmodo.com/9-quotes-from-winston-churchill-that-are-totally-fake-1790585636
Misattributed

Source: The Tales of Alvin Maker, Prentice Alvin (1989), Chapter 15.

“The only thing we know about the future is that it is going to be different.”
Source: 1960s - 1980s, MANAGEMENT: Tasks, Responsibilities, Practices (1973), Part 1, p. 44

“If you saw what I see for the future in Yugoslavia, it would scare you.”
As said to former Foreign Minister Mirko Tepavac in 1971. (Yugoslavia: A State that Withered Away, Dejan Jović, Purdue University Press, 2009, p.45)
Other
Variant: We look not at the things which are what you would call seen, but at the things which are not seen. For the things which are seen are temporal. But the things which are not seen are eternal.
Source: A Wrinkle in Time

“John the Divine
Called me Merlin,
But all future kings
Shall call me Taliesin.”
The Tale of Taleisin
Context: I have come to salvage Elphin's honor and his freedom. Taliesin am I, primary chief bard to Elphin.
Primary chief poet
Am I to Elphin.
And my native country
Is the place of the Summer Stars.
John the Divine
Called me Merlin,
But all future kings
Shall call me Taliesin.