Life For Death

What are some good depressing quotes about life/death in famous plays?

I’m asking for any deep quotes that have been said in well-known plays, such as Death of a Salesman or something like that. Lines that have been said about life/death that are somewhat depressing.

William Shakespeare – “Julius Caesar”, Act 2 scene 2
– Cowards die many times before their deaths;
The valiant never taste of death but once.
Of all the wonders that I yet have heard,
It seems to me most strange that men should fear;
Seeing that death, a necessary end,
Will come when it will come.