I understand prove-all's view, and I understand the view the Greeks had about an afterlife.
Yet the NT Scriptures (like those examples I posted), give us more information of what occurs after flesh death.
Matt 10:28
28 And fear not them which kill the body, but are not able to kill the soul: but rather fear Him Which is able to destroy both soul and body in hell.
KJV
In Matt.10:28 Jesus said to not fear those who can kill our body (flesh) but not our soul, but fear Him Who can destroy both body and soul in the lake of fire ("hell" there = Greek geena, the OT valley of Hinnom used as a symbol for the perpetual burning garbage pit outside Jerusalem). That is a new revelation, because by that our Lord Jesus showed that our "soul" is not... killed at flesh death, which can mean only one thing about its properties, and that is the 'soul' is a separate entity from our flesh body.
This means we have to take another look at OT Scripture like Eccl.12:5-7:
Eccl 12:5-7
5 Also when they shall be afraid of that which is high, and fears shall be in the way, and the almond tree shall flourish, and the grasshopper shall be a burden, and desire shall fail: because man goeth to his long home, and the mourners go about the streets:
6 Or ever the silver cord be loosed, or the golden bowl be broken, or the pitcher be broken at the fountain, or the wheel broken at the cistern.
7 Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.
KJV
Because of what our Lord Jesus revealed about our 'soul' continuing after flesh death, one must rethink the meaning of what Solomon described there in Ecclesiastes 12 considering "spirit". The Matt.10:28 Scripture suggests that "spirit" which goes back to God is not simply about something without consciousness that just animated an earthly flesh body of material matter.
Likewise with the example of Christ at His death and resurrection preaching The Gospel to the "spirits in prison" per 1 Pet.3 and 1 Pet.4:5-6, He was not preaching to evil spirits, but to the spirits of men that had died back to the time of Noah. That was OT prophecy that He would do that...
Isa 42:6-7
6 I the LORD have called thee in righteousness, and will hold thine hand, and will keep thee, and give thee for a covenant of the people, for a light of the Gentiles;
7 To open the blind eyes, to bring out the prisoners from the prison, and them that sit in darkness out of the prison house.
KJV
Then with the story our Lord Jesus gave at the end of Luke 16 about Lazarus and the rich man dying, and their part that had continued existence was carried to either side of Paradise, where they still had awareness, why would He mislead us if those objects weren't true? and that especially since they agree with what He said in Matt.10:28 about the soul not being killed after flesh death?