Question

Which of these excerpts from poems by Emily Dickinson uses irony?

My cocoon tightens, colors tease,
I'm feeling for the air;
A dim capacity for wings
Degrades the dress I wear.
Could she have guessed that it would be;
Could but a crier of the glee
Have climbed the distant hill;
Had not the bliss so slow a pace, —
Who knows but this surrendered face
Were undefeated still?
One dignity delays for all,
One mitred afternoon.
None can avoid this purple,
None evade this crown.
There's a certain slant of light,
On winter afternoons,
That oppresses, like the weight
Of cathedral tunes.
Heavenly hurt it gives us;
We can find no scar,
But internal difference
Where the meanings are.
Exultation is the going
Of an inland soul to sea, —
Past the houses, past the headlands,
Into deep eternity!

Answer 1

Exultation is the going

Of an inland soul to sea, -

Past the houses, past the headlands,

Into deep eternity!

Answer 2

In my opinion, the whole poem is quite ironic - although she is mentioning the exultation and the royal color of death, the poem itself begins with the narrator saying that she cannot breathe - that she doesn't want to die.
So, I would say that the ironic parts are:
Exultation is the going
Of an inland soul to sea, -
Past the houses, past the headlands,
Into deep eternity!