What house is so strong, or what state so enduring that it cannot be utterly overthrown by animosities and division

What house is so strong, or what state so enduring that it cannot be utterly overthrown by animosities and division? M. Tullius Cicero. Laelius on Friendship. Section 23.

Note: And I thought Abraham Lincoln thought up his famous quote about a divided house all by himself!

Image: Roman Civil War depicted in the game Total War: Rome II.