The mind is spirit. Immediately after the Big Bang, the primitive universe was nothing but liquid like electromagnetic energy which was in the billion and billions of degrees. As the universal temperature began to cool, the quantum of that liquid-like electromagnetic energy, which is believed to be wave particles which in reality, are not particles at all, as they have zero mass, no electric charge and yet carry angular and linear momentum, which is the animating principle that becomes all that was, is, and ever will be.
All visible matter is but invisible wave particles. What is a rock? Except a gathering of molecules that you perceive as that rock. But what is a molecule? It is no more than a gathering of atoms which are but sub-atomic particles that you perceive as atoms, which sub-atomic particles are simply a gathering together of wave particles, each occupying different positions in space and time, in the apparent one point in time.
So we understand that the visible universe is no more than a cloud of wave particles that you, through the senses of that body in which you, the mind/spirit is developing, and which body is but a vibrating pattern of wave particles within the greater cosmic cloud, perceive as the visible universe.
The animating principle that has become the universe is called the Logos which is formless and void and yet carries angular and linear momentum. All things came into existence through the Logos, all things that exist were made by and from the Logos, and all that exists, exist for the Logos. The Logos is the singularity in which we exist and yet the Logos exists in us, for the Logos pervades all that is and is the entire universal body.
The mind/spirit in all living things, develops from the experiences and information taken in through the senses of the bodies of all those life forms, and all spirit=information/experience, is imprinted on the animating principle that pervades the entire universal body and is the life of the universe.
The Logos that was in the beginning, by gathering all the spirit of all my ancestors, human and pre-human, has become Who I Am.
Who I Am, is connected in space-time to its beginning, It has never experienced death, and nor can it die. I, the spirit/mind that develops in this body through the experiences and information that is taken in through the senses of this body, am one with, and an extension of Who I Am. When this body; skin, muscle, bone, hair, brain matter, etc, has returned to the universal elements from which this body was formed, a facsimile of I will remain within the Logos who evolves to become all that this universal body will be.
Then will come the day when this living universal body is rolled up as a scroll with a great hissing noise and the universal elements will become so excited they will burn up and fall as massive columns of fire beyond all measure in height and depth into the Great Abyss, where all that had existed will be condensed back into the infinitely dense, infinitely hot, and infinitesimally small singularity that had become this living universal body in which an intellectual Godhead had developed. But that is not the end of I.
For out of that seemingly bottomless pit, will rise the resurrected body in which a supreme personality of Godhead had developed, and I, who became one with and an obedient servant to Who I Am, will arise once more as the Godhead dies in the process of involution, in order that we in the process of evolution might live again. And so I repeat, Mind is spirit, and the cosmic cloud of wave particles which are not particles at all, but spirit. Which spiritual cosmic cloud is the ever evolving mind that is God, who is today as he was yesterday and will be into all eternity. He is the only constant, in that he is constantly evolving. Show to me a mind that has ceased to evolve, and I will show to you a mind that has ceased to exist.
