Identify the speaker and his tone in Shakespeare's Sonnet 19, providing supporting evidence.

In Shakespeare's Sonnet 19, there is no way to know who is
speaking, except that it is someone in love: The speaker could be Shakespeare, but does
not need to be. The tone of the speaker deals with the passage of time and all that is
lost because of it. It starts out with a sense of defeat and acceptance on the part of
the poet, but then shifts later in the sonnet.

The first
quatrain href="http://web.cn.edu/kwheeler/lit_terms_P.html">personifies time, with
an href="http://web.cn.edu/kwheeler/lit_terms_A.html">apostrophe, speaking
directly to it, and it is capitalized to emphasize its power: "Devouring
Time..." The speaker continues by describing things that symbolize
power on earth: the lion's paws; teeth from the the tiger's jaws—time can destroy even
these. Regarding even the mystical or supernatural, like the mythical phoenix, reborn
from the ashes, "said to live about five hundred years," kill it—for "Time" kills all of
these powerful things.

In the second quatrain, as "glad and
sorry" seasons pass (spring/summer vs fall/winter), do your worst, the poet says; and
again, Time, do whatever you want: throughout the world, even with "fading sweets"
(flowers); but one thing you cannot
touch.

This is the end of the second quatrain, and with the
ninth line—the beginning of the third quatrain—the poet's attention to the first two
quatrains shifts. He orders, or pleads, that time leave alone the
face of the one he cares for; draw no lines of age (with "antique pen"); let this
one person's face be spared (remain "untainted") as a pattern of
beauty for all that follow ("For beauty's pattern").

The
rhyming couplet sums up the poet's main point: Time, go ahead, and do the worst you can
because the words written here will allow my love to remain
forever ageless. In this way, the writer will be victorious, and
not Time.