"Whatsoever thy hand findeth to do, do it with thy might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, whither thou goest."-- Ecclesiastes 9:10.
[66]Again speaking of man, God says of him: "Nevertheless man being in honor abideth not: he is like the beasts that perish".

(Psalm 49:12) Anything that perishes cannot be conscious, cannot be in existence and of course cannot be immortal.
[67]It was Jesus who said: "God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life".

(John 3:16) Here the proof is conclusive that death means the perishing of all unless redemption is received through Jesus Christ.

This would absolutely disprove consciousness of the dead and would disprove also the immortality of the soul.
[68]Death is spoken of in the Bible as a sleep, for the reason that God intends in his due time to awaken all of the dead and give them an opportunity of life.

The Bible abounds in the expressions referring to the dead as asleep.