“A house divided against itself cannot stand.”
Lincoln uses a structural metaphor: a system pulled permanently in opposite directions cannot remain stable forever.
Speech at Springfield, Illinois, June 16, 1858.
“All warfare is based on deception.”
Strategy depends partly on managing what an opponent believes about intentions, strength, timing, and position rather than revealing every fact directly.
The Art of War, Chapter I 'Laying Plans,' section 18, Lionel Giles translation (1910), original scan leaf 62. 'All warfare is based on deception' begins Giles's section 18 before the examples of seeming unable, inactive, near or far. This remains translation-mediated ancient military strategy, not generic business, relationship or current operational advice.
“Uneasy lies the head that wears a crown.”
Status and authority are presented as carrying anxiety and responsibility rather than guaranteeing comfort or peace of mind.
Henry IV, Part 2, Act III Scene 1; reviewed against the 1921 Yale Shakespeare edition edited by Samuel B. Hemingway. King Henry speaks the crown line at the close of his sleepless midnight monologue after contrasting his wakefulness with the sleep of poor subjects and the storm-tossed ship-boy. It remains dramatic kingship rhetoric rather than clinical evidence about leadership stress.
“Those who cannot remember the past are condemned to repeat it.”
Remembering earlier failures matters because retained experience can change later judgment instead of allowing the same pattern to recur unnoticed.
The Life of Reason, Reason in Common Sense; Santayana connects memory with the possibility of genuine progress.
“Power concedes nothing without a demand. It never did and it never will.”
The line argues that meaningful reform usually requires explicit demands rather than passive hope that power will surrender itself.
Speech in Canandaigua, New York, August 3, 1857.
“There is no instance of a country having benefited from prolonged warfare.”
Long conflict consumes strength and resources, so duration itself becomes a strategic cost even before the outcome is decided.
The Art of War, Chapter II “Waging War,” section 6, Lionel Giles translation (1910), printed page 12 / scan leaf 68 in Giles’s original full edition on Wikisource, cross-checked against Project Gutenberg #17405. “There is no instance of a country having benefited from prolonged warfare” closes the opening argument about weapons, strength, treasure and state resources being exhausted by a protracted campaign. It remains ancient military-strategy argument in translation, not a generic business, relationship or current geopolitical rule.
“Supreme excellence consists in breaking the enemy’s resistance without fighting.”
The highest strategic result achieves the objective while avoiding the destruction, expense, and uncertainty of direct battle when another path can work.
The Art of War, Chapter III “Attack by Stratagem,” section 2, Lionel Giles translation (1910), printed page 17 / scan leaf 73 in the original Giles edition on Wikisource, cross-checked against Project Gutenberg #17405. “Supreme excellence consists in breaking the enemy’s resistance without fighting” contrasts mere battlefield victory with achieving the strategic objective without direct combat. This remains ancient military-strategy argument in translation, not generic advice for business, relationships or ordinary personal conflict.
