Spirit, Mind, Soul, and Eternal life
Christ Jesus once said that those who believed in Him and God would live even if they had died.
It means that after a man dies physically or his body dies, he could live spiritually. The spirit of a man can have its own life, and through the spirit he can live after his physical death.
Christ Jesus also said that God is the spirit and God never dies. So, if a man becomes a pure spirit without a physical body, he can live spiritually like God.
Our minds are contained in our physical brains, so that we are apt to think that mind is an adjunct to the brain or the physical body. But, the truth must be the brain or the physical body is an adjunct to the spirit.
It is also because that as God is the spirit while He created this physical world and universe where our physical bodies belong, this physical world and universe is an adjunct to the spirit of God. Therefore, fundamentally, spirit comes before a physical entity of a man.
In this context, our physical bodies or brains exist for us to develop our spirit in the physical world and universe. And when our physical bodies die, our spirit should go to the spiritual world that belongs more directly to God than our physical bodies and the physical world.
Based on the words of Christ Jesus, our spirit should leave our bodies when we die and go to the spiritual world; otherwise Heaven and the hell about which Christ Jesus talked would be nonsense.
But what are our spirits? A spirit must be extension of the mind of each man. Even if you deny the existence of God, you are using your mind to think so, which means that you are also a spiritual entity that can exist, since God is the spirit.
Our minds are materially work of our brains. Work of a brain is chemical and physical reactions of brain cells and cerebral nerves. However, molecules and atoms as well as electrons are materials a unit of which cannot produce a mind or a spirit. A mass, namely a brain, of billions or more of cells, molecules and atoms as well as electrons functions to produce a specific chemical and biological state which is a mind. However, a mind does not belong to materials but constitute a spiritual world that must be part of the spiritual world where God lives.
The Bible says that a spirit comes down to each man like a dove flies to each man. Then a spirit grows in each man and a soul is formed in each man. Under the soul and spirit, a mind of each man should work.
Anyway, Christ Jesus said not to be afraid if a man should be killed for his faith in Christ Jesus and God, because such a man can get eternal life.
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Mar 5:14 And they that fed the swine fled, and told it in the city, and in the country. And they went out to see what it was that was done.
Mar 5:15 And they come to Jesus, and see him that was possessed with the devil, and had the legion, sitting, and clothed, and in his right mind: and they were afraid.
Mar 5:16 And they that saw it told them how it befell to him that was possessed with the devil, and also concerning the swine.