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THERE ARE THREE KINDS OF EXISTENCE - Physical, Mental and Spiritual
There are several kinds of existences.
1. There is the physical existence where things are measured in x, y, and z coordinates
with respect to sidereal time, space and motion.
2. There is a mental existence where things are measured internally in x, y, and z
coordinates with respect to our internal time, space and motion.
3. There is the spiritual existence where things are measured in eternal x, y, and z
coordinates with respect to eternal time, space and motion.
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Physical existence is the easiest to describe because we can perceive this existence with our immediate senses. We know there are stars, a moon, and planet earth where we reside. We can feel the skin of an orange, see its color, taste its juice, smell its aroma, and so forth, and we experience the same kind of things with the rest of the world around us. We see an airplane moving through the sky and air traffic controllers can tell you how fast it is going, where it is at a given instant in longitude, latitude and altitude above the ground. Hardly anyone will deny there is such a thing as physical existence.
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Mental existence is a little more difficult to comprehend but comprehensible nonetheless. For example, a blind person can be flown somewhere and taken to a place, any place. By touching feeling and smelling, a mental image is formulated in the blind person's mind of what the immediate environment "looks" and feels like. It could be hot, cold, warm, soft, hard, and the air could be fresh or stale. The mental existence is all the blind person has with respect to the real existence. Space therefore is perceived or imagined space, and the same thing can apply to motion and time. Without a clock or watch, without a speedometer, a blind person cannot know how fast they are traveling or whether time is flying or standing still, whether it is daytime or nighttime. Everything is judged by something internal, something mentally perceived. Although we don't realize it, we too, have internal clocks and mechanisms that are not synchronized with sidereal time, space or motion. If we are at a party, time may fly by rapidly if we are having a good time. If we are at a funeral, time may drag on, or it may seem forever if we are listening to a graduation speech. Unless we had a watch to tell us the time of day, we might think the speech took two hours, when it may have been only one half hour. Our mental time can compress or expand outside of sidereal time, and the same thing applies to space and motion. If we are in a tight room sitting on a chair, or outside in the prarie sitting on a chair, space contracts and expands for us mentally. If we are on a motorcycle going 60 miles per hour, or on an airplane going 400 miles per hour, it may "seem" we are going faster on the motorcycle.
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Spiritual existence is completely independent of physical and mental existence. In physical and mental existence, matter is involved, whereas in spiritual existence, matter cannot be involved, else it is not a spiritual existence. What that simply means is this: sidereal time, space and motion, in addition to, mental time, space and motion are mutually exclusive with eternal time, space, and motion. All time, space and motion in the spiritual existence are relative to a frame of reference that is stationary in time, space, and motion. This sounds absurd at first contemplation. For how can anything consist of time, space, and motion and be stationary? What it simply means is that only the reference is stationary, while all else is non-stationary. For example, a magnet is stationary, yet its force causes all else within its field of attraction to move towards it. All else is moving, but it is stationary. Consider therefore, a magnet that is infinitely far away and infinitely powerful enough to attract everything in the universe to it. Then everything in the universe would be moving towards it. Now simply consider a spiritual magnet in the same way. What you have then, is spiritual motion, time and space, devoid of matter. Consequently, one can say as I have said in my book "A Vision of God",
"In Heaven, there is infinite space, But space does not exist;
There is infinite time, But time does not exist.
There is you and He, He and you,
Forever, forever, forever."
This at first, sounds contradictory.
"There is infinite space, But space does not exist" is most definitely at first sight, contradictory. What is missing in the sentence if we are not careful, is the preface to the sentence "In Heaven". That is the key. In the spiritual realm of eternity, there is infinite space because God is infinite, but God is also absolutely pure in spirit. God is absolutely devoid of matter. So if God is devoid of matter, how can His infiniteness be measured? That's the point, it cannot, for if God could be measured, God would not be infinite. In the spiritual existence therefore, space is not measured sidereally, but eternally, otherwise if there were not space in the spiritual existence, it would be nothing, but it is everything, and it is also devoid of matter. This is difficult to comprehend the first time around, so don't give up because it is where God's Home is, it is Heaven.
In the one true God, 
Carmen