Inmortality Through Verse
In this time and age writers would use the technique of making things or people be seen as being immortal.Immortality is the ability to live forever. Nothing can outlive the love or lovers in this poem because they are being written about.
Allusions
An allusion is an indirect reference to someone or something. Shakespeare makes many allusions in sonnet 55. He alludes to his lover and the love that they share.