In this poem, the narrator is speaking to death as if he is a person, and more precisely, a bully full of hot air with no real power. The poet is making fun of death and taunting him, saying he is a loser who has nothing to brag about and shouldn't think he can scare people. Here is a translation:
Don't be proud of yourself Death, even if some people say you are
the powerful and scary one, because you're not;
The people you think you've killed
haven't really died, and you, lame, pathetic Death, can't kill me either.
Rest and sleep are what you are like,
and we enjoy resting and sleeping; and since you give us a stronger version of rest and sleep, we like you even more than normal resting and sleeping.
Our best people go with you first,
which is a rest for their bodies and liberates their souls.
You don't decide who dies: in fact, you are at the mercy of dumb luck, rulers, and criminals
You have to live with poison, war and disease,
and you are not special, because opium or sleeping pills can also put us to sleep
and do it better than you: so what are you bragging about?
All you do is put us to sleep for a little while, then we wake up forever
And we'll never be dead again; Death, you are the one who will die.