Anna Komnene (c. 1083-1153)
“The opposition is strong when the whole body is welded together and of one mind; but let there be faction, and it splits up into many parts and becomes feebler, an easy prey to its enemies.”
- The Alexiad (Book XIII, section 4) by Anna Komnene, translated by E.R.A. Sewter, (Penguin Classics, 2009).