Read the excerpt from Act II of Hamlet.

I have of late,—but wherefore I know not,—lost all my mirth, forgone all custom of exercises; and indeed it goes so heavily with my disposition that this goodly frame, the earth, seems to me a sterile promontory; this most excellent canopy, the air, look you, this brave o’erhanging firmament, this majestical roof fretted with golden fire, why, it appears no other thing to me but a foul and pestilent congregation of vapours.

What is the effect of Hamlet’s use of metaphors in this excerpt?

The metaphors prove that Hamlet is angry with his mother.
The metaphors show that Hamlet is still feeling hopeful.
The metaphors reveal Hamlet’s plan to murder Claudius.
The metaphors emphasize Hamlet’s state of depression.