Poem Analysis - "Shall I compare thee to a summer's day?", William Shakespeare

"Shall I compare thee to a summer’s day?" (Sonnet 18), William Shakespeare

“Shall I compare thee to a summer’s day?

Thou art more lovely and more temperate.

Rough winds do shake the darling buds of May,

And summer’s lease hath all too short a date.

Sometime too hot the eye of heaven shines,

And often is his gold complexion dimmed;

And every fair from fair sometime declines,

By chance, or nature’s changing course, untrimmed;

But thy eternal summer shall not fade,

Nor lose possession of that fair thou ow’st,

Nor shall death brag thou wand’rest in his shade,

When in eternal lines to Time thou grow’st.

     So long as men can breathe, or eyes can see,

     So long lives this, and this gives life to thee.”

        “Shall I Compare Thee” by William Shakespeare is a romantic, passionate poem, in which the one spoken of in the poem is compared to a summer’s day. The poem has a peaceful, joyous mood, and although it is short and precise, the poem is written in an unhurried, leisurely way, as if the writer has eternity to simply speak of the beauty of his muse.

The first line in the poem asks the question, “Shall I compare thee to a summer's day”, which is then answered in the following lines.

In line two, it is stated that that one being compared to is more mild and pleasant than the summer, as well as beautiful.
The last four lines, it is written that the beauty of the one being compared to will never die, as long as the poem still exists and it is still being read.

The poem interests me because of the strange, beautiful metaphors the writer uses to compare things that represent summer to the person the poem was written for. 
It is clear in the poem the writer loves the one the poem is written for by the way metaphors that are used to symbolize their beauty.