“Fortunately, there is a sane equilibrium in the character of nations, as there is in that of men. The force of passion is balanced by the force of interest.”
Martí : Thoughts/Pensamientos (1994)
Context: Fortunately, there is a sane equilibrium in the character of nations, as there is in that of men. The force of passion is balanced by the force of interest. An insatiable appetite for glory leads to sacrifice and death, but innate instinct leads to self-preservation and life. A nation that neglects either of these forces perishes. They must be steered together, like a pair of carriage horses.
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José Martí 103
Poet, writer, Cuban nationalist leader 1853–1895Related quotes

“There are only two forces that unite men — fear and interest.”
Napoleon : In His Own Words (1916)
Context: There are only two forces that unite men — fear and interest. All great revolutions originate in fear, for the play of interests does not lead to accomplishment.

Senate Select Committee on Secret Military Assistance to Iran and the Nicaraguan Opposition (Iran-Contra hearings) (1987)
Video of Inouye's excerpt http://www.youtube.com/watch?v=EbFphX5zb8w
Daniel K. Inouye: Reference of excerpt http://www.nationmaster.com/encyclopedia/Daniel-K.-Inouye
The Mission of Sheltron: Reference http://www.sheltron.us/sheltron/introduction.html

The Principles of Biology, Vol. I (1864), Part III: The Evolution of Life, Ch. 7: Indirect Equilibration
Principles of Biology (1864)
Context: It cannot but happen that those individuals whose functions are most out of equilibrium with the modified aggregate of external forces, will be those to die; and that those will survive whose functions happen to be most nearly in equilibrium with the modified aggregate of external forces.
But this survival of the fittest, implies multiplication of the fittest. Out of the fittest thus multiplied, there will, as before, be an overthrowing of the moving equilibrium wherever it presents the least opposing force to the new incident force.

Napoleon : In His Own Words (1916)

“How often are we forced to charge fortune with partiality towards the unjust!”
Letter (4 December 1801), printed in Bartlett's Familiar Quotations (2002)

Quarterly Review, 127, 1869, pp. 551-552
1860s

p. 50 https://books.google.com/books?id=Zsm3TLe1cAUC&pg=PA50
The Expansion of England (1883)