The delight we get when reading poetry often comes from its musical qualities, or from the 
striking way a poet uses words.1- Structural Devices
Contrast, Illustration, Repetition: these indicate the way a whole poem has been built and 
become apparent as soon as the meaning of the poem has been found .In the lines from The Ancient Mariner there is contrast between the motion of the ship 
which was travelling so quickly that it 'burst into that silent sea' and the complete lack of motion 
which immediately follows: 'Down dropt the breeze, the sails dropt down.'For the sake of convenience, devices may be divided into three groups: 
structural, sense, and sound.They are called devices and can be found when 
we analyse a poem.Contrast.