Cicero (Marcus "Tully" Tullius)

I like myself, but I won't say I'm as handsome as the bull that kidnapped Europa.
--De Natura Deorun

O tempora! O mores! [Oh the times! The customs!]
--In Catilinam

Endless money forms the sinews of war.
--Philippics

Law stands mute in the midst of arms.
Cui bono? [Who stands to gain by this?]
--Pro Milone

The aim of forensic oratory is to teach, to delight, to move.
--De Optimo Genere Oratorum

Socrates was the first to call philosophy down from the heavens and to place it in cities, and even to introduce it into homes and compel it to inquire about life and standards and goods and evils.
--Tusculanae Diputatione

An exciting recent biography of Cicero is
Anthony Everitt's
Cicero: The Life and Times of Rome's Greatest Politician

For more information about Cicero
http://www.utm.edu/research/iep/c/cicero.htm

For more information about Cicero, including links to his writings
http://www.utexas.edu/depts/classics/documents/Cic.html