“How sharper than a serpent's tooth it is
To have a thankless child!”
Lear, Act I, scene iv.
Source: King Lear (1605–6)
Help us to complete the source, original and additional information
William Shakespeare 699
English playwright and poet 1564–1616Related quotes

“I would rather trust my child to a serpent than to a teacher who does not believe in God.”
Sentence-Sermons from Brigham Young University Quarterly quoted in The Latter-Day Saints' Millenial Star, Vol. 70 https://books.google.com/books?id=eItJAAAAYAAJ&pg=PA452&lpg=PA452&dq=He+that+cheats+another+is+a+knave;+but+he+that+cheats+himself+is+a+fool.&source=bl&ots=WBAQiPjQX6&sig=WLEdKN2_kXPXj8jZALKCp2dguaQ&hl=en&sa=X&ved=0ahUKEwjXmNeF_7HMAhUH42MKHdySDgsQ6AEILzAE#v=onepage&q=fool&f=false

“From child births to hearses, flow like the Nile covered surface
Bit the fruit from the serpent.”
Nas Is Coming
On Albums, It Was Written (1996)

Source: On the Fetish Character in Music and the Regression of Listening (1938), p. 290

“If we do an eye for an eye and a tooth for a tooth, we will be a blind and toothless nation.”

As quoted in "Osborn States the Case For Evolution", in The New York Times (12 Jul 1925), p. XX1; the tooth was misidentified as anthropoid by Osborn, who over-zealously proposed Nebraska Man in 1922; the tooth was shortly thereafter found to be that of a peccary (a Pliocene pig) when further bones were found. A retraction was made in 1927, correcting the scientific blunder.

First Week, Second Day.
La Semaine; ou, Création du monde (1578)