How does “Death, Be Not Proud” argue that death cannot defeat the eternal soul?

In his sonnet “Death, Be Not Proud,” John Donne argues that death is not a powerful victor but a weak force incapable of corrupting the eternal soul.1

The poem employs a defiant, argumentative tone to dismantle death’s perceived authority:

• Redefining Death: The speaker asserts that death cannot truly kill him. Instead, he characterizes death as a mere "short sleep" that serves only to rest the body while freeing the soul to ascend to heaven.1
• Challenging Agency: In the concluding sestet, the poet mocks death’s "proud posturing," arguing that death lacks true autonomy. It is not a master of its own actions but a servant to fate, chance, and human decisions.1
• The Final Triumph: The poem culminates in a paradox that underscores the soul's immortality: "And death shall be no more; Death, thou shalt die." By framing death as a temporary transition rather than an end, Donne asserts that the eternal soul ultimately outlasts and defeats death itself.1