“Never answer an anonymous letter.”
Berra expressly denied this widespread attribution in Yogi: It Ain’t Over (1989), p. 11, but later embraced it in The Yogi Book: I really didn’t say everything I said! (1998). Quote Investigator http://quoteinvestigator.com/2013/10/13/anon-letter/ traces this saying to the 19th century.
Disputed, Misattributed
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Yogi Berra 60
American baseball player, manager, coach 1925–2015Related quotes

“It was not customary to receive or answer letters at such unreasonable hours.”
In context of British General Gillespie's letter asking surrender of Gorkhalis during the Anglo-Nepalese War as quoted in page no. 14 of [Fraser, James Baillie, 1820, Journal of a Tour Through Part of the Snowy Range of the Himālā Mountains, and to the Sources of the Rivers Jumna and Ganges, London, Rodwell and Martin, https://books.google.com/?id=7ZlBAAAAcAAJ&printsec=frontcover#v=onepage&q&f=false, 69385527]

Eight or Nine Wise Words About Letter-Writing (1890)

“Capital Letters Were Always The Best Way Of Dealing With Things You Didn't Have A Good Answer To.”

Quote from Gainsborough's letter to his friend & composer William Jackson of Exeter, from Pall Mall, 25 Jan. 1777; as cited in Thomas Gainsborough, by William T, Whitley https://ia800204.us.archive.org/6/items/thomasgainsborou00whitrich/thomasgainsborou00whitrich.pdf; New York, Charles Scribner's Sons – London, Smith, Elder & Co, Sept. 1915, p. 388
1770 - 1788


“Let us never underestimate the power of a well-written letter.”
Source: Persuasion

“Let us never underestimate the power of a well-written letter.”