Who says the following and why?

Mis-shapen chaos of well-seeming forms!
Feather of lead, bright smoke, cold fire, sick health!
Still-waking sleep, that is not what it is!
This love feel I, that feel no love in this.

The Prince is lamenting his harsh punishment on the brawling families.

Romeo is discussing how "unnatural" it is that blissful love can make him so miserable.

Benvolio is telling Capulet he does not want to disturb Romeo.

Benvolio is discussing the nature of paradox.