“Good Will is the mightiest practical force in the universe.”
Cleveland Address, reported in Bartlett's Familiar Quotations, 10th ed. 1919.
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Charles Fletcher Dole 12
Unitarian minister, speaker, and writer 1845–1927Related quotes

“Two forces rule the universe: light and gravity.”

“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 force of universalism is in you Basques, not in the Spanish state”
Interview in ARGIA (27 June 2010) https://www.dropbox.com/s/cihuwrieedr8s1j/44101916-LAPIKO-TXOSTENAK-ZIZEK.pdf

26 July 2021 https://twitter.com/wendyrogersaz/status/1419773739693137927

“Japanese management practices succeed simply because they are good management practices.”

“Who are we? We are the life force power of the universe.”
Ted Talks http://www.byronkatie.com/newsletter_april_08.html
The Theology of Civilization (May 1899)

" Beware The Atavistic Dynamics Undergirding Two American Wars, https://misesuk.org/2017/06/21/beware-the-atavistic-dynamics-undergirding-two-american-wars/" The Ludwig von Mises Centre For Property and Freedom, June 21, 2017.
2010s, 2017