Irregular rhyme - shows lack of direction
Anaphora of imperatives - shows passion and yearning
Sibilance - reflects echoing and emptiness without a lover
Oxymorons - reflects disillusionment
Personification - longing for missed souls to enter Heaven and no common shows extent of longing
Plosives - urgency and passion
End rhyme - 'death' and 'breath' instability of life and death
Full stop - end of long enjambment shows finality
Context - life without a lover, rejection of Collinson or death of father