| Quote #4
NATHANIEL: [Reads] 'If love make me forsworn, how shall I swear to love?
Berowne is worried that Rosaline will accuse him of being incapable of fidelity, since he broke his vow. But for him, it's about priorities – he has to break that vow to make one to her.
| Quote #5
KING: And Jove for your love would infringe an oath.
The King uses Berowne's razor-sharp wit as an intimidation tactic.
| Quote #6
Let us once lose our oaths to find ourselves,
Again, Berowne argues that they have more to gain from breaking their promise (which he thought was crazy from the beginning) than keeping it.