Shakespeare continues harping on about getting old and how his young lover needs to forget him.

Sonnet 73

That time of year thou mayst in me behold
When yellow leaves, or none, or few, do hang
Upon those boughs which shake against the cold,
Bare ruined choirs, where late the sweet birds sang.
In me thou see'st the twilight of such day
As after sunset fadeth in the west;
Which by and by black night doth take away,
Death's second self, that seals up all in rest.
In me thou see'st the glowing of such fire,
That on the ashes of his youth doth lie,
As the death-bed, whereon it must expire,
Consumed with that which it was nourish'd by.
This thou perceiv'st, which makes thy love more strong,
To love that well, which thou must leave ere long.

Shakespeare tried to catch me out again by making Sonnet 71 a two parter. But I was ahead of the game for once...

Our story continues with a very ill Shakespeare.

Sonnet 72

O! lest the world should task you to recite
What merit lived in me, that you should love
After my death,--dear love, forget me quite,
For you in me can nothing worthy prove.
Unless you would devise some virtuous lie,
To do more for me than mine own desert,
And hang more praise upon deceased I
Than niggard truth would willingly impart:
O! lest your true love may seem false in this
That you for love speak well of me untrue,
My name be buried where my body is,
And live no more to shame nor me nor you.
For I am shamed by that which I bring forth,
And so should you, to love things nothing worth.

Shakespeare tells his lover to stop caring about him when he's dead. Easier said than done to be honest.

Sonnet 71

No longer mourn for me when I am dead
Than you shall hear the surly sullen bell
Give warning to the world that I am fled
From this vile world with vilest worms to dwell:
Nay, if you read this line, remember not
The hand that writ it, for I love you so,
That I in your sweet thoughts would be forgot,
If thinking on me then should make you woe.
O! if, I say, you look upon this verse,
When I perhaps compounded am with clay,
Do not so much as my poor name rehearse;
But let your love even with my life decay;
Lest the wise world should look into your moan,
And mock you with me after I am gone.