The second stanza the speaker learnt the second lesson which was to accept nature and their selves for today the flowers in the field may be beautiful and blooming but tomorrow the flowers know their beauty will not last forever where they may withered away and torn to pieces. In line 7 and 8 "You do obey your months and times, but i would have it ever spring;" metaphor can be found in the sentence.
In the last stanza the poet learnt his last lesson which was to accept death as referred in line 13 and 14 " Oh teach me to see death and not to fear, but rather take truce." The only literary device that can be found is rhyme. In line 17 and line 18 " You fragrant flowers then teach me that my breath like yours may sweeten and perfumed my