Just because they are spirits, it does not mean that all of them will exist eternally.
If the body [of a person] lives without listening to the Word of God
and the Holy Son, their spirit falls into death and cannot function being confined
in death.
That is ‘the death of a spirit.’
It is really good that God exists eternally without dying.
Therefore, always believe in, love, and rely on the Trinity.
Then They will work [upon you].