“There does not exist a man sufficiently intelligent never to be tiresome.”
Source: Reflections and Maxims (1746), p. 190.
Help us to complete the source, original and additional information
Luc de Clapiers, Marquis de Vauvenargues 60
French writer, a moralist 1715–1747Related quotes

Attributed to Kafka in Ambiguous Spaces (2008) by NaJa & deOstos (Nannette Jackowski and Ricardo de Ostos), p. 7, and a couple other publications since, this is actually from Report to Greco (1965) by Nikos Kazantzakis, p. 434
Misattributed

“A man who prays lives out the mystery of existence, and a man who does not pray scarcely exists.”
Love is a Radiant Light: The Life & Words of Saint Charbel (2019)

“Adulthood does not exist. Man is an eternal child.”
Flor de Obsessão: as 1000 melhores frases de Nelson Rodrigues.
Foreword To the 1962 Printing, p. xiv
The Political Economy Of Growth (1957)
“Man, when he does not grieve, hardly exists.”
El hombre, cuando no se lamenta, casi no existe.
Voces (1943)