Variant: You can make more friends in two months by being interested in them, than in two years by making them interested in you.
Source: How to Win Friends and Influence People (1936), p. 52 (in 1998 edition)
“Everybody is interesting for an hour, but few people can last more than two.”
As quoted in "Wanderer of Endless Curiosity" by R. Z. Sheppard in Time magazine (10 July 1989) http://www.time.com/time/printout/0,8816,958134,00.html
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V.S. Naipaul 34
Trinidadian-British writer of Indo-Nepalese ancestry 1932–2018Related quotes

Akio Morita (1989) in: Peter Krass ed. (2000) The Book of Management Wisdom: Classic Writings by Legendary Managers. p. 235.

“Wit lasts no more than two centuries.”
Le même esprit ne dure que deux cents ans.
Letter to Honoré de Balzac (30 October 1840)

“We try to get more done in two hours than other teams do in two weeks.”

“The battle, if you could call it that, lasted no more than a few seconds.”
Source: The Icebound Land

“Nowadays you can go anywhere in the world in a few hours, and nothing is fabulous any more.”

Source: Saints and Sinners