What is the meaning of the ( )'s phrase in this excerpt from Sonnet 126 by William Shakespeare?

O thou, my lovely boy, who in thy power
Dost hold (Time's fickle glass), his sickle, hour;

Time is changeable and inconstant.
Time and glass are immoral.
Time is liable to break like glass.
Time, like the glass or mirror, always reflects the truth

Question

What is the meaning of the ( )'s phrase in this excerpt from Sonnet 126 by William Shakespeare?

O thou, my lovely boy, who in thy power
Dost hold (Time's fickle glass), his sickle, hour;

Time is changeable and inconstant.
Time and glass are immoral.
Time is liable to break like glass.
Time, like the glass or mirror, always reflects the truth

lilymq · Answer

I'd say the second one.

lilymq · Answer

Or the last one

lilymq · Answer

Because this is one of Shakespeare's last poems with the theme that time destroys both love and beauty. But in this phrase, he's saying that the youth will remain beautiful, even if he grows older with time.

lilymq · Answer

Ughh so confusing. Sorry I'm not sure.