| Quote #1
DUMAIN: The grosser manner of these world's delights
Dumain takes pleasure in the idea of his ascetic (you know, self-denying) vow separating him from peasants.
| Quote #2
BEROWNE: O, these are barren tasks, too hard to keep,
Berowne doesn't agree with pitting man's principles against his natural instincts. And doesn't think he can handle it.
| Quote #3
BEROWNE: Necessity will make us all forsworn
Berowne spies a loophole when the King says he'll welcome the Princess. They'll all just break their vow and call it necessity.