“Knock Knock. Who's there? The Truth. No joke.”
Stephen Colbert (1964) American political satirist, writer, comedian, television host, and actor
[Paulson, Dave, John Crist: A Christian comedian who's gently poking fun at faith, https://www.tennessean.com/story/entertainment/2019/04/11/john-crist-christian-comedian-nashville-comedy-festival-ryman-auditorium/3215394002/, 6 September 2019, The Tennessean, April 11, 2019, en]
“Knock Knock. Who's there? The Truth. No joke.”
Stephen Colbert (1964) American political satirist, writer, comedian, television host, and actor
Horace Mann (1796–1859) American politician
James Burgh, in The Dignity of Human Nature, Or, A Brief Account of the Certain and Established Means for Attaining the True End of Our Existence (1754); this is very widely misattributed to Mann, appearing at least as early as the publication of Thoughts Selected from the Writings of Horace Mann (1867) edited by Mary Mann.
Misattributed
James Burgh (1714–1775) British politician
Variant in other editions: Do not think of knocking out another person's brains, because he differs in opinion from you; it will be as rational to knock yourself on the head because you differ from what you thought ten years ago.
The Dignity of Human Nature (1754)
Jimmy Carr (1972) British comedian and humourist
Charlotte Cripps (January 31, 2007) "Stand up and be counted, comedians", The Independent.
Peter Gabriel (1950) English singer-songwriter, record producer and humanitarian
On his duet with Kate on his song "Don’t Give Up", on his album So
The Kate Bush Story (2014)
David Lynch (1946) American filmmaker, television director, visual artist, musician and occasional actor
As quoted in My Love Affair with David Lynch and Peachy Like Nietzsche: Dark Clown Porn Snuff for Terrorists and Gorefiends (2005) by Jason Rogers, p. 7
Context: I don't think that people accept the fact that life doesn't make sense. I think it makes people terribly uncomfortable. It seems like religion and myth were invented against that, trying to make sense out of it.
Donald J. Trump (1946) 45th President of the United States of America
Hardball with Chris Matthews (15 July 2002), as quoted in The World According to Trump (2005) by Ken Lawrence, p. 23
2000s
Jerry Glanville (1941) American former football player and sports coach
David Albright, Glanville looking for a little more action at Portland State http://sports.espn.go.com/ncf/preview07/columns/story?id=2967161, ESPN.com, August 9, 2007.
Alexei Maxim Russell (1976) Canadian writer
from official website http://www.whynot-world.com