Dumas, Alexandre pere -- The Black Tulip [La Tulipe Noire], ch. 28 (1850)

Dave — Tue, 05 Apr 2016 19:08:09 +0000

There is nothing more galling to angry people than the coolness of those on whom they wish to vent their spleen.

Alexandre Dumas, père (1802-1870) French novelist and dramatist
The Black Tulip [La Tulipe Noire], ch. 28 (1850)

Jefferson, Thomas -- Letter (1816-05-21) to Francis Eppes

Dave — Fri, 18 Jul 2014 15:11:45 +0000

Whenever you feel a warmth of temper rising, check it at once, and suppress it, recollecting it will make you unhappy within yourself, and disliked by others. Nothing gives one person so great advantage over another, as to remain always cool and unruffled under all circumstances.

Thomas Jefferson (1743-1826) American political philosopher, polymath, statesman, US President (1801-09)
Letter (1816-05-21) to Francis Eppes
(Source)

Often updated as "Nothing gives one person so much advantage over another as to remain always cool and unruffled under all circumstances."

WIST Quotations

Dumas, Alexandre pere -- The Black Tulip [La Tulipe Noire], ch. 28 (1850)

Jefferson, Thomas -- Letter (1816-05-21) to Francis Eppes