The Notebooks of Leonardo da Vinci (1883), XIX Philosophical Maxims. Morals. Polemics and Speculations.
“Speak ill of no man, but speak all the good you know of everybody. ”
The Works of Ben Jonson, Second Folio (1640), Timber: or Discoveries
Ben Jonson
Misattributed
“Always be ready to speak your mind, and a base man will avoid you.”
Source: 1790s, The Marriage of Heaven and Hell (1790–1793), Proverbs of Hell, Line 37
“A man speaking sense to himself is no madder than a man speaking nonsense not to himself.”
Attributed to Einstein by his colleague Léopold Infeld in his book Quest: An Autobiography (1949), p. 291 http://books.google.com/books?id=fsvXYpOSowkC&q=%22garbage+man%22#v=snippet&q=%22garbage%20man%22&f=false
Attributed in posthumous publications
As quoted in The Histories by Herodotus, 3.72
The validity of the quote is questionable. http://www.shsu.edu/~his_ncp/Heropers.html
Attributed
“These wretched kings,
Of whom all men speak ill, have oft some good in them.”
Ces malheureux rois,
Dont on dit tant de mal, ont du bon quelquefois.
Le Meunier de Sans-Souci. (Ed. 1818, Vol. III., p. 205).
Translation reported in Harbottle's Dictionary of quotations French and Italian (1904), p. 26.
