"mea culpa" (My fault.)
"Semper Fidelis" (Always Faithful (Motto of the US Marine Corps) )
"Si vis pacem, para bellum." (If you wish for peace, prepare for war.(Flavius Vegetius Renatus c. 375 AD.))
"Romani ite domus" (Roman go home! ---(Monty Phyton's Life of Brian))
"POST FESTUM PESTUM" (Literally "After holidays The Plague", it means The end of Holidays is a shit!)
"nemo surdior est quam is qui non audiet" (No man is more deaf than he who will not hear)
"Mutatis mutandis" (With the necessary changes)
"Non ministrari, sed ministrare" (Not to be served, but to serve)
"Domus in colle" (House on the Hill)
"Deus est intus" (God is Within)
"Si me perdis, te perdam" (Waste me and I'll waste you (a sundial motto))
"Hic si stas, hinc eris" (Here you stay, here you belong (a sundial motto)))
"Solem quis dicere falsum audeat" (Who will dare to say that the sun is wrong? (a sundial motto from Virgil's Georgics))
"Sol tibi signa dabit" (The sun will give you signs (a sundial motto from Virgil's Georgics))
"Commune hoc ignorantiae vitium est: quae nescias, nequicquam esse profiteri" - Leon Battista Alberti: De Re Aedificatoria, VI,2 (A common thing with the ignorant, to despise what they do not understand; James Leoni's translation, London 1726 - this translation is not entirely to the point, either, I feel - a better one might be: "A common vice among ignorants is to reject the idea that there is anything to know")
"De mortiis aut bene aut nihil." (Speak well of the dead or not at all.(a more literal translation would be "Of the dead, well or not at all." I'm not 100% on mortiis, I've found people using it as mortiis, mortibus, and mortuis. The next translation seems to be the best version)
"De mortuis, nihil nisi bonum." (Never speak ill of the dead. (more literal "Of the dead, (say) nothing unless good."))
"Carpe Narem" (Pick your nose)
"Quos vult perdere Jovis prius dementat." (Those whom he wants to destroy, Jupiter first makes angry.)
"Verba volant, scripta manent." (Spoken words fly away, written words remain.)
"Veni, Vidi, Ambulavi." (I came, I saw, I walked.)
"In caecus terrae, luscus rex est." (In the land of the blind, the one-eye-man is king.)
"Cogito, Facio Fio!" (Think it, Do it, Become it!)
"Non urinat in ventum" (Don't piss into the wind)
"Homo sapiens non urinat in ventum" (A wise man doesn't piss into the wind)
"Tempus edax rerums" (Time devours all things (quote from Roman poet Ovid))
"Mors Cum Terrore Novo Venit" (Death has come with a new terror)
Quanta doctrinae commoditas sit in libris
Quam facilis, quam arcana!
Quam tuto libris humanae ignorantia paupertatem
sine verecundia denudamus!
Hi sunt magistri qui nos instruunt
sine virgis et ferula,
sine verbis et cholera, sine pannis et pecunia.
si accedis, non dormiunt;
Si inquirens interrogas, non abscondunt;
Non remurmurant si oberres;
Cachinnos nesciunt, si ignores.
(Richard de BuryPhilobiblon, I, 9)
And finally, one must consider how great the ease of learning
there is in books, how yielding, how trusty !
How safely we reveal, without shyness, in the face of our books
the poverty of our human ignorance !
They are teachers who instruct us without switches or rods,
without slaps or anger, without notice of rags or riches.
If you approach them , they are not asleep;
If you ask a question, they do not hide;
They do not mutter at you if you make a mistake;
When you are ignorant, they do not know how to laugh at you.
"Musica delenit bestiam feram." (Music soothes the savage beast.)
"Quantum materiae materietur marmota monax si marmota monax materiam possit materiari?" (How much wood would a woodchuck chuck if a woodchuck could chuck wood?)
"Nihil est--in vita priore ego imperator Romanus fui." (That's nothing--in a previous life I was a Roman Emperor.)
"Aio, quantitas magna frumentorum est." (Yes, that is a very large amount of corn.)
"Recedite, plebes! Gero rem imperialem!" (Stand aside plebians! I am on imperial business.)
"Oblitus sum perpolire clepsydras!" (I forgot to polish the clocks!)
"mea culpa" (My fault.)