Ruben Dario - Fatality

The tree is happy because it is scarcely sentient;
the hard rock is happier still, it feels nothing:
there is no pain as great as being alive,
no burden heavier than that of conscious life.

To be, and to know nothing, and to lack a way,
and the dread of having been, and future terrors...
And the sure terror of being dead tomorrow,
and to suffer all through life and through the darkness,

and through what we do not know and hardly suspect...
And the flesh that temps us with bunches of cool grapes,
and the tomb that awaits us with its funeral sprays,
and not to know where we go,
nor whence we came! ...

Ruben Dario

http://www.poemhunter.com/poem/fatality-3/