Question

Which lines in the poem illustrate that death's power is an illusion?

Answer 1

The lines that illustrate that death is an illusion are:

..."though some have called thee

Mighty and dreadful, for thou art not so..."Meaning that death does not cause that dread , fear or terror.

..."For those whom thou think'st thou dost overthrow..."It explains that  death did not put an end to the lives of  those men as it was thought death  thought did.

..."Thou art slave to fate..."Death depends on something that unavoidably will happen to any person.

"....One short sleep past, we wake eternally..."The persona here is emphasizing the idea that dying means stepping into eternity.

"...And poppy  or charms can make us sleep as well..."people can be put to sleep by consuming opium, for example.Then , after all that has been said about it ,the power of death is nothing but an illusion.

Answer 2

The lines in the poem which illustrate that death's power is an illusion are:
A) Mighty and dreadful, for thou art not so; For those whom thou think'st thou dost overthrow.
E) One short sleep past, we wake eternally And death shall be no more; Death, thou shalt die.