The first sentence of a sonnet by Shakespeare: when forty winters shall besiege.

This poem actually laments life and time. Forty winters have passed, that is, forty years. As for why it is winter, because winter is white, the poem says that there are signs of aging between the eyebrows and eyes.

the first half of the whole poem:

"When Forty Winters shall be Seige Thybrow,

and Dig Deep Trenches in Thy Beauty's Field,

Thy Youth's Proud Livery, So Gazed on Now,

Will be a tatter'd weed, of small worth held:

Then being ask'd where all thy beauty lies,

Where all the treasure of thy lusty days,

to say, within thin own deep-sunken eyes,

were an all-eating shame and thriftless pratise. "

is the main sigh that the once beautiful days have disappeared now, and the once wasted beautiful days are now known to regret.

the second half of the whole poem:

"How much more practice preserved thy beauty's use,

If thou couldst answer 'This fair child of mine

Shall sum my count and make my old excuse,'

Proving his beauty by succession thine!

this was to be new made when you think art old,

and see thy blood warm when you think it's cold. "

I mainly lamented that if I cherished my youth and didn't waste so many years, if I could leave a descendant in that year, I could make him proudly say," This child will continue my life and inherit my beauty. " How wonderful

So this whole poem laments that life is short and people should cherish their youth.