How does Shakespeare portray anxieties about ageing in Sonnet 73?

Sonnet 73 employs an impressive list of metaphors to represent the writer’s anxieties about getting older. Shakespeare uses the season of autumn as a physical representation of these thoughts, feelings which are present in all the sonnets before. In the first quatrain, the image of the approaching winter displays all that has been lost in the days before, 'where yellow leaves, or none, or few, do hang...'. The enjambment throughout the poem also causes the reader to feel as though they are speeding towards the end, as Shakespeare feels of life and death.In the second and third quatrains, there are more metaphorical representations of theend, seeing the 'twilight of such day' and the 'glowing of such fire'. Both portray the light going out. The sibilance in the line 'Death's second self, that seals up...' adds a hushed tone to the poem, perhaps reflective of the poet’s mood. The final couplet embodies the poets desire to make the most of life while he still can, encouraging the subject to 'love more strong' while he still can.