“All human power is a compound of time and patience.”
Tout pouvoir humain est un composé de patience et de temps.
Eugénie Grandet http://fr.wikisource.org/wiki/Eug%C3%A9nie_Grandet (1833), translated by Katharine Prescott Wormeley, ch. VI.
Original
Tout pouvoir humain est un composé de patience et de temps.
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Honoré de Balzac 157
French writer 1799–1850Related quotes

“Compound interest is the most powerful force in the universe.”
Variants: "... is man’s greatest invention" and "... is the eighth wonder of the world".
May add: "He who understands it, earns it; he who doesn’t, pays it."
This Snopes article http://www.snopes.com/quotes/einstein/interest.asp concluded that its status was uncertain, while this post from The Quote Investigator http://quoteinvestigator.com/2011/10/31/compound-interest/ concludes it is most likely a false attribution, since variants of the quote date back to at least 1916, with the early variants not being attributed to Einstein.
Disputed

“The strongest of all warriors are these two — Time and Patience.”
Bk. X, ch. 16
Source: War and Peace (1865–1867; 1869)

“Patience mimics the power of infinity.”
Source: Rise of the Evening Star

Source: Reason: The Only Oracle Of Man (1784), Ch. V Section I - Argumentative Reflections on Supernatural and Mysterious Revelation in General
“Any artwork needs time and patience and needs above all a quiet mind.”
Letter in a private collection quoted in Gillian Lindsay - The Story of the Lark Rise Writer 1990 ISBN 9781873855539
Literary Observations

“Patience has more power than force.”
prevale.net
Original: (it) La pazienza ha più potere della forza.

“Patience has more power than force.”
From the Aphorisms http://www.prevale.net/aphorisms.html page of the official website of Prevale