What are the metaphors and similes in Edgar Allen Poe's "A Dream"?

This poem contains one main simile and one main metaphor.
Firstly, the third stanza compares the "holy dream" that Poe experiences to something
that cheers him up as if it were "a lonely spirit
guiding":

That
holy dream- that holy dream,
While all the world were chiding,
Hath
cheered me as a lovely beam

A lonely spirit
guiding.

Secondly, the last
stanza contains quite a powerful metaphor, as "Truth" is compared to a "day-star," or
the sun, arguing that Truth is similar to the sun in the way that it is so bright and
it's light penetrates from so far away:

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What though that light, thro' storm and
night,
So trembled from afar-
What could there be more purely
bright
In Truth's
day-star?

Both of these
examples of figurative language help to underline Poe's message on this poem. If we
remain focussed on the past, we will never be able to live in the present. To be
successful in the present we need to learn to see the light that the present has for us
and learn lessons from the past, taking the wisdom we have gained from those lessons on
with us into the future.