"What is Poetry"

Shakespeare's title, "That time of year though mayst in me behold" introduces the key metaphoric message that the poem is conveying to the audience.  The title includes "that time of year" which goes on to correlate with message within the poem describing old age, and lack of youth.  The "mayst in me behold" conveys the idea that this person's youth is slipping from right beneath them.
Woodsworth's title, "Nuns Fret Not" allows the audience to grasp a central idea to what the poem is going to symbolize. Being that the word "Nun" is included in the title, one can conclude that the poem may often be about Nun's daily lives, which is somewhat correct.  The title, "Nuns Fret Not" relays the message that within the poem the Nun's are not worried about their limitations in life.
Brook' title "First Flight, Then Fiddle." When you first glance at Brook's title, the two words 'First' and 'Then' really pop out.  It can be correlated with the message of life.  One should always enjoy their life rather than rushing through moments and memories.  When I first glance at this title, I conclude that Brooke's poem might convey that message.
Rosetti's tittle "Sonnet" is a very unique title for a poem because it is an actual type of poem.  The title introduces the audience to the exact type of poem and words that are going to be spoken as well as an introduction of what the underlining meaning of a sonnet really is.