Latin Sayings

A
• Ab imo pectore -- "With all [my] heart" (attributed to Julius Caesar) От всего сердца
• Absentem laedit, qui cum ebrio litigat. -- "He who quarrels with a drunk hurts an absentee."
• Acta est fabula -- "What happened is a fable," or "The fable is ended" (Augustus' last words)
• Aegroto dum anima est, spes est. -- "As long as a sick person is conscious (or, has a good character, or reacts), there is still hope."
• Age quod agis - "Do what you do", in the sense of "Do well what you do" or "Be serious in what you do"
• Amor patriae nostra lex. -- "Love of the fatherland is our law."
• Alea iacta est. -- "The die is cast!" (Said by Julius Caesar when he crossed the Rubicon, contrary to law.) Жребий брошен
• Ars longa, vita brevis. -- "Art is long, life is short." Жизнь коротка, а искусство вечно
• Asinus asinorum in saecula saeculorum. -- "The greatest jackass in eternity."
• Audaces fortuna iuvat -- "Luck helps those who're brave." (Vergil, Aeneis 10,284) Храброго пуля боится
• Audi, vide, tace, si tu vis vivere. -- "Hear, see, be silent, if you [wish] to be alive ."
• Audiatur et altera pars. -- "The other part should be heard, too." Выслушай и другую сторону
• Auri sacra fames. -- "The accursed hunger for gold." (Vergil, Aeneis 3,57; later quoted by Seneca quod non mortalia pectora coges, auri sacra fames -- "What aren't you able to bring men to do, miserable hunger for gold!") Проклятая жажда золота
B
• Beati pauperes spiritu -- "Lucky are those of a poor mind" (Sermon on the Mount) Блаженны нищие духом
• Beatus, qui prodest, quibus potest. -- "He is lucky who helps everyone he can." or, very differently, "He is lucky the one who gets ad advantage from those on which he has some power."
• Bene diagnoscitur, bene curatur. -- "Something that is well diagnosed can be cured well."
• Bis dat, qui cito dat. -- "He who gives quickly gives twice." Вдвое подает тот, кто подает вовремя
• Bis repetita non placent -- "Repetitions are not well-received." (Horace, Ars Poetica 365)
• Bona diagnosis, bona curatio. -- "Good diagnosis, good cure."
• Bona valetudo melior est quam maximae divitiae. -- "Good health is worth more than the greatest wealth." Здоровье дороже богатства
C
• Carpe diem -- "Use the day" (Horace, Odes I,11,8)
• Cibi condimentum est fames. -- "Hunger is a spice for any meal." Голод – лучшая приправа
• Concordia civium murus urbium. -- "Harmony of citizens is the wall of cities."
• Consuetudinis vis magna est. -- "The power of habit is great." Велика сила привычкию
• Consuetudo altera natura est. -- "Habit is second nature." Привычка – вторая натура.
• Contraria contrariis curantur. -- "Opposites are cured by their opposites."
• Contra vim mortis non est medicamen in hortis. -- "There's no herb against the power of death." Как мертвому припарки.
• Cuiusvis hominis est errare -- "Every human can err." (Cicero)
• Cura, ut valeas! -- "Take Care."
D
• De gustibus non est disputandum. -- "Matters of taste ought not to be disputed." О вкусах не спорят.
• De mortuis nihil nisi bene. -- "Of the dead, nothing but good."; "Say only good things about the dead." О мертвых ничего кроме хорошего.
• Delenda Carthago -- "Carthago must be destroyed" (Cato the elder) Карфаген должен быть разрушен!
• Deliriant isti Romani. -- "They are mad, those Romans"; -- René Goscinny, Asterix and Obelix comic
• Desinit in piscem mulier formosa superne - "The beautiful woman ends in a fish tail." (Horace, Ars poetica)
• Diem perdidi -- "I lost the day" (Emperor Titus, passed down in Suetonius's biography (8))
• Divide et impera. -- "Divide and conquer." Разделяй и властвуй.
• Donec eris felix multos numerabis amicos. -- "As long as you're happy, you'll have many friends." (Ovid, Tristia I,9,5)
• Dulce et decorum est pro patria mori. -- Horace, Odes III, 2, 13 -- "It is sweet and honorable to die for the fatherland."
• Dum spiro, spero. -- "As long as I breathe, I hope." Пока дышу, надеюсь.
• Dura lex, sed lex. -- "The law is harsh, but it is [still] the law." Закон суров, но он закон.
• Dura necessitas. -- "Necessity is harsh." Суровая необходимость.
E
• E fructu arbor cognoscitur. -- "The tree can be recognized by its fruits."
• Errare humanum est. Perseverare diabolicum. -- "To err is human. To repeat error is of the Devil." (Seneca)
• Et nunc reges, intelligite erudimini qui judicatis terram... -- "And now kings, be warned, you who judge on earth..." (Bible)
• Exegi monumentum aere perennius -- "I built a monument, more durable than ore" (Horace, Odes III, 30, 1) Я памятник себе воздвиг нерукотворный.(А. С. Пушкин)
F
• Felix qui potuit rerum cognoscere -- "Lucky [is the person] who could realize things" (variant of Vergil, Georgica 2, 490)
• Festina lente ! "Make haste slowly" - proceed quickly but with caution, a motto of Augustus Caesar. Торопись медленно.
• Fide, sed qui, vide. -- "Trust but take care whom."
• Fluctuat nec mergitur -- "Shaken by the waves, but it will not sink" (inscription on Paris' coat of arms)
• Fortes fortuna uvat. or Audaces fortuna juvat. -- "Fortune favors the brave." ) Храброго пуля боится
G
• Gloria victis. -- "Glory to the defeated." Слава побежденному.
• Gutta cavat lapidem non vi, sed saepe cadendo. -- "A drop drills the rock not with force but by falling repeatedly." Капля камень точит.
H
• Habent sua fata libelli. -- "Books have their fate."
• Hannibal ante portas. -- "Hannibal before the gates," i.e. wasting time while the enemy is already here. Ганнибал у ворот
• Hic Rhodus, hic salta. -- "It's Rhodos, jump here." Aesop
• Hodie mihi, cras tibi. -- "What's to me today, tomorrow to you."
• Homines quod volunt credunt. -- "Men believe what they want to." (Julius Caesar)
• Homo homini lupus est. -- "Man is a wolf to man." Hobbes Человек человеку – волк.
• Homo sum, humani nihil a me alienum puto. "I am human, so nothing that is human is foreign to me." Я человек и ничто человеческое мне не чуждо.
• Hypotheses non fingo. -- "I feign no hypotheses" (I do not assert that any hypotheses are true). Newton, Principia
I
• Ignorantia iuris nocet. "Being ignorant of law harms."
• Ignorantia legis non excusat. "Ignorance of the law is no excuse." Незнание закона не освобождает от наказания.
• Ignoti nulla cupido. "The unknown does not tempt." Чего не знаешь, о том не скучаешь.
• Inter arma enim silent leges (Musae). -- "During wars laws" (or "arts") "are silent." Cicero, Oratio Pro Annio Milone (IV) Когда говорят пушки, музы молчат.
• In dubio pro reo -- "When in doubt, in favour of the accused"
• In vino veritas. -- "There is truth in wine." That is, "Wine in excess will bring out truth."

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Latin sayings here.

As for me, I know that a lot of American States adopted some Latin mottos, e.g. Virginis's motto is "Sic Semper Tyrannis", which is Latin for "Thus ever to tyrants!" because the goddess Virtua on the state seal has a conquered tyrant under her heel.