What are some of the poetic devices used in the poem "Song of the Rain" by Kahlil Gibran?This is the poem :- I am dotted silver threads dropped...

The two most important devices used in Gibran's "Song of
the Rain" are metaphor and
personification.

The first two stanzas
begin, respectively, with the phrases "I am dotted silver threads dropped from heaven,"
and "I am beautiful pearls."  The poet does not mean this phrases literally; rather he
means that the rain is like silver threads from heaven and
beautiful pearls.  Such comparisons that do not use the words "like" or "as" are called
metaphors.

Gibran also makes extensive use of
personification, which means that he speaks about inanimate objects--such as the rain
and fields--as if they were human.  Examine, for example, stanza
3:

When I
cry, the hills laugh;

When I humble myself the flowers
rejoice;

When I bow, all things are
elated.

Stanzas 4-8 also
contain many examples of personification.

The poem also
contains two similes--comparisons that do use the words "like" or
"as."  The rain is "like earthly like," and it "kills" the heat in the air "as woman
overcomes man with / The strength she takes from
him."

"Song of the Rain" also contains an interesting
reference to another work of art; this is known as an allusion. 
Stanza 2 reads:

I am beautiful pearls, plucked from
the

Crown of Ishtar...

To
embellish the gardens.

Ishtar was the ancient Middle
Eastern goddess of love and fertility (among other things).  By comparing the rain to
"pearls plucked from the Crown of Ishtar," the poet introduces the themes of rain as the
great source of plant fertility, and also the theme of rain as a symbol of love.  This
second theme--of rain's connection to love--is discussed in stanzas 3, 6, and
7.