Quotes about knock
page 2
Source: Night World, No. 1
Source: Tempt Me at Twilight

“You'll never have a quiet world till you knock the patriotism out of the human race.”
O'Flaherty V.C. (1919)
1910s
Source: Heartbreak House

Quote in Imagen de Frida Kahlo by Gisèle Freund in Novedades (Mexico City) (10 June 1951)
1946 - 1953

“If opportunity doesn't knock, build a door”
Variant: If opportunity doesn’t knock, build a door.

“How strange that nature does not knock, and yet does not intrude!”
Source: Howl's Moving Castle
Source: Night World, No. 1

“Boy, you knock on the devil's door and he will head slam you through the wall.”
Source: No Mercy
Source: The Ape Who Guards the Balance
“Knock her dead, my man."
"Oh no." Xcor shook his head."That shan't be necessary. This one I like.”
Source: The King

2000s, 2001, I Can Hear You, the Rest of the World Hears You (September 2001)
Source: Lover Awakened

Source: The Captain is Out to Lunch and the Sailors Have Taken Over the Ship

“What do little birdies see when they get knocked unconscious?”

“When the devil comes knocking on your door simply say "Jesus, it's for you.”
Source: Sunsets

Rally in 1980, related to the then-ongoing Singapore Airlines pilot strikes due to salary issue http://www.bbc.com/news/world-asia-32012346
1980s
Quantum Profiles (1991), John Stewart Bell: Quantum Engineer
Violence is golden
A Sky Without Eagles (2014)

Watson, Jr. cited in: Joseph Mancuso (1975) Managing technology products. p. 160.

Fume l'encens, veille l'amour,
Dans son lit bleu la vierge est morte;
Couve le feu, tombe le jour,
L'Ange, mes soeurs, frappe à la porte.
"La Mystérieuse Chanson"

In Latin, nullum magnum ingenium sine mixtura dementiae fuit (There is no great genius without some touch of madness). This passage by Seneca is the source most often cited in crediting Aristotle with this thought, but in Problemata xxx. 1, Aristotle says: 'Why is it that all those who have become eminent in philosophy or politics or poetry or the arts are clearly melancholic?' The quote by Plato is from the Dialogue Phaedrus (245a).
On Tranquility of the Mind

And I answer them most mysteriously,
"Are birds free from the chains of the skyway?"
Song lyrics, Another Side of Bob Dylan (1964), Ballad In Plain D

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

Khafi Khan, Muntakhab-ul-Lubab, pp. 245-46. quoted from Lal, K. S. (1992). The legacy of Muslim rule in India. New Delhi: Aditya Prakashan. Chapter 6

"Flood that released America's demons", The Sun, September 10, 2005

2010s, 2016, August, Speech at rally in Wilmington, North Carolina (August 9, 2016)

On Later With Jools Holland (21 May 2004)
About the Notre Dame fire, Odds & Ends

Discussing the song "Like a Rolling Stone" in Rolling Stone magazine (1988)
Source: The Anarchist Cookbook (1971), Chapter Three: "Natural, Nonlethal, and Lethal Weapons", p. 79.

Nobel Prize lecture http://nobelpeaceprize.org/en_GB/laureates/laureates-2007/gore-lecture/, 10 December 2007.

From James Boswell's Life of Johnson (1791), October 26, 1769.

Prem Nagar Ashram, India, 10 December 1971 - quoted on p256 of "Who is Guru Maharaj Ji?" published by Bantam, 1973
1970s

Quote of Henri Moore in his interview with David Silvester, in 'The Sunday Times Magazine', 16 Febr. 1964, pp. 18, 20-22
1955 - 1970
Loot (1965), Act I

“You beat your pate, and fancy wit will come;
Knock as you please, there's nobody at home.”
On a Dull Writer, reported in John Hawkesworth, The Works of Jonathan Swift, D.D., Dean of St. Patrick's, Dublin (1754), p. 265. Alternately attributed to Alexander Pope by Bartlett's Quotations, 10th Edition (1919). Compare: "His wit invites you by his looks to come, But when you knock, it never is at home", William Cowper, Conversation, line 303
Disputed
'Eddie Waring Communicates'
Essays and reviews, Visions Before Midnight (1977)

Speech in Limehouse, East London (30 July 1909), quoted in Better Times: Speeches by the Right Hon. D. Lloyd George, M.P., Chancellor of the Exchequer (London: Hodder & Stoughton, 1910), pp. 154-155.
Chancellor of the Exchequer
Why You Should Be a Socialist http://www.marxists.org/archive/foot-paul/1977/wysbas/ch8.htm, Ch8 (1977)
As quoted in Lee Konitz: Conversations on the Improviser's Art https://books.google.com/books?id=pc4CsgVHLw0C&pg=PA65 (2008) by Andy Hamilton and Lee Konitz, p. 65

Sugar Ray Leonard on his first fight with Roberto Duran http://www.youtube.com/watch?v=yDYnO9gGwIQ&feature=related
The Guardian, February 10, 2004. http://www.guardian.co.uk/uk/2004/feb/10/books.booksnews2

I'm Just Talkin' About Tonight, written with Scotty Emerick)
Song lyrics, Pull My Chain (2001)

As quoted in this interview http://www.theuncool.com/journalism/david-bowie-playboy-magazine/ in Playboy magazine (September 1976)

Amritanandamayi's Address Upon Receiving an Honorary Doctorate of Humane Letters from the State University of New York (2010)

Sam, Sam, Pick Oop Tha' Musket

1912 after return from Japan

Sam, Sam, Pick Oop Tha' Musket