For the living know that they shall die: but the dead know not any thing, neither have they any more a reward; for the memory of them is forgotten. Also their love, and their hatred, and their envy, is now perished; neither have they any more a portion for ever in any thing that is done under the sun.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.
God himself has made clear the contrast between the living and the Dead. The living KNOW they shall die! Key word here is know .what does it mean? As define in merriam Webster dictionary KNOW: to perceive directly : have direct cognition of (2) : to have understanding of <importance of knowing oneself.
In other words the living understands,perceive, has the ability to learn. This makes perfect sense, since they have a functional working brain right? But not so with the dead. Psalms 146;4 tells us His breath goeth forth, he returneth to his earth; in that very day his thoughts perish. At death man is conscious of nothing! He thinks not and perceive not. HE no longer has the breath of life, which made him a living functional human being. When God made Adam Genesis 2;7 he had heart, lung, and brain. These organ began to function after the breath of life was breathed into him. So without the breath of life man cannot live and function. It is important to have a correct understanding of this subject. If we fail to believe God's word on this matter, we open ourselves to some serious deception. Such as believing we can communicate with the dead, as did saul. Spiritualism will be one of the end time deceptions mentioned in Revelation 16;13-14And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet. For they are the spirits of devils, working miracles, which go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty. Lets us rest of faith in the word of God.