“4797. The Tongue is not Steel, yet it cuts sorely.”
Introductio ad prudentiam: Part II (1727), Gnomologia (1732)
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Thomas Fuller (writer) 420
British physician, preacher, and intellectual 1654–1734Related quotes
“My work cuts like a steel blade at the base of a man's penis.”
Response to a student's question in her writing class, as quoted by Louis Menand in the New Yorker (June 8-15, 2009), p. 112.

“108. A Fool’s Tongue is long enough to cut his own Throat.”
Introductio ad prudentiam: Part II (1727), Gnomologia (1732)

And he pressed the silver spoon against the blade. Will, holding the knife, felt only the slightest resistance as the tip of the spoon's handle fell to the table, cut clean off.
"The other edge," the old man went on, "is more subtle still. With it you can cut an opening out of this world altogether. Try it now. Do as I say — you are the bearer. You have to know. No one can teach you but me, and I have not much time left. Stand up and listen."
Source: His Dark Materials, The Subtle Knife (1997), Ch. 8 : The Tower of the Angels

“It wouldn’t be the first time his sharp tongue had cut his own throat.”
Source: The Way of Shadows (2008), Chapter 9 (p. 64)

“When you cut out a man's tongue, you make his words matter that much more.”
BANNED! BIG CREATORS GETTING THE BOOT OVER NEW SCANDAL! (Published 20 July 2016, at 5min 21 sec) https://www.youtube.com/watch?v=DI4r0mSe7BY&feature=youtu.be&t=5m21s
BANNED! BIG CREATORS GETTING THE BOOT OVER NEW SCANDAL! (2016)