
Oh, come with old Khayyam, and leave the Wise
To talk; one thing is certain, that Life flies;
One thing is certain, and the Rest is Lies;
The Flower that once has blown for ever dies.
FitzGerald's first edition (1859).
The Rubaiyat (1120)
Source: Rubaiyat of Omar Khayyam
Oh, come with old Khayyam, and leave the Wise
To talk; one thing is certain, that Life flies;
One thing is certain, and the Rest is Lies;
The Flower that once has blown for ever dies.
FitzGerald's first edition (1859).
The Rubaiyat (1120)
“One thing that's certain about going outdoors: When you come back inside, you'll be scratching.”
All the Trouble in the World (1994)
Source: The Summing Up (1938), Ch. 5, p. 12 http://books.google.com/books?id=2hNbAAAAMAAJ&q=%22There+is+only+one+thing+about+which+I+am+certain+and+this+is%22&pg=PA12#v=onepage- 13 http://books.google.com/books?id=2hNbAAAAMAAJ&q=%22that+there+is+very+little+about+which+one+can+be+certain%22&pg=PA13#v=onepage
“There's only one thing that's certain
And that's everybody, everybody's hurting”
"Everybody's Hurting"
Women + Country (2010)
“Not to be absolutely certain is, I think, one of the essential things in rationality.”
"Don't Be Too Certain!"
1940s, Am I An Atheist Or An Agnostic? http://www.positiveatheism.org/hist/russell8.htm (1947)
Source: Am I an Atheist or an Agnostic?
Written on the Bedchamber Door of Charles II, as quoted in The Book of Days : A Miscellany of Popular Antiquities (1832) by Robert Chambers, Viol. II, July 26, p. 126.