Caution - many well-known and oft cited quotations are probably apocryphal. Thing is, those who are literate in Western culture know them anyway.
All I know is that I know nothing - Socrates
And yet it Moves - Galileo
Another such victory and we are lost- Pyrrhus
Cogito ergo sum - Descartes
Here I stand; I can do no other - Luther
I do not agree with a word you say, but I will defend to the death your right to say it - Voltaire
Know Thyself - Socrates
Let them eat cake - Marie Antoinette
Nasty, brutish, and short - Hobbes
Question Authority - Socrates
The ends justify the means - Machiavelli
The Invisible hand of the Market - Adam Smith
Veni, Vidi, Vici - Julius Caesar
All I know is that I know nothing - Socrates
And yet it Moves - Galileo
Another such victory and we are lost- Pyrrhus
Cogito ergo sum - Descartes
Here I stand; I can do no other - Luther
I do not agree with a word you say, but I will defend to the death your right to say it - Voltaire
Know Thyself - Socrates
Let them eat cake - Marie Antoinette
Nasty, brutish, and short - Hobbes
Question Authority - Socrates
The ends justify the means - Machiavelli
The Invisible hand of the Market - Adam Smith
Veni, Vidi, Vici - Julius Caesar