When individuals approach one another with deep purposes on both sides — Contention

"Great contest follows, and much learned dust Involves the combatants; each claiming truth, And truth disclaiming both."

"The contention that is good for the city—I pray that god never destroy that."

"Ducibus tantum de funere pugna est."

"But curb thou the high spirit in thy breast, For gentle ways are best, and keep aloof From sharp contentions."

"A continual dropping in a very rainy day and a contentious woman are alike."

"So when two dogs are fighting in the streets, When a third dog one of the two dogs meets: With angry teeth he bites him to the bone, And this dog smarts for what that dog has done."