In the poem "death, be not proud" by john donne

death, be not proud, though some have called thee
mighty and dreadful, for thou art not so;
for those whom thou think'st thou dost overthrow
die not, poor death, nor yet canst thou kill me.
from rest and sleep, which but thy pictures be,
much pleasure; then from thee much more must flow,
and soonest our best men with thee do go,
rest of their bones, and soul's delivery.
thou art slave to fate, chance, kings, and desperate men,
and dost with poison, war, and sickness dwell,
and poppy or charms can make us sleep as well
and better than thy stroke; why swell'st thou then?
one short sleep past, we wake eternally
and death shall be no more; death, thou shalt die.

what is the meaning of “one short sleep past, we wake eternally” (line 13)? use textual evidence from the passage to support your answer.'