One element in the book explains that any description someone might bring "back" after an NDE must be expressed in the limited terms of the tools at hand (the human brain and language) in this universe. We perceive and physically seem to "live" within a linear time frame that is created micro-moment to micro-moment by the act of our conscious observation and we have no words and only very rough analogous imagery that can convey the experience. The images of a tunnel, gardens, rivers, etc. are translations of things which cannot otherwise be described or expressed.
"Heaven" is not only real but is the timeless infinite from which the observation is made. Another point he makes (the writer is a Christian) is that the only human religion which is 100% for certain NOT true is Atheism.
That is why I took so much confort after my SO or longtime boyfriend, David, had died last month the children’s version of the book “Heave is for Real” for children, which has wonderful picture drawings as Colton Burpo when he was a little kid discribes.
A friend of mine in the music ministry has given me the adult version of the book, “Heaven is for Real” to read.
The human conceptualization of dimension Time may be the problem which holds us back from conceptualizing a better notion of wht it means to be 'alive' ... the soul exists in a 'greater-than-linear' spacetime reality yet is fed data collected from a linear temporal framework of our perception, even though events are occurring in a greater-than-linear spacetime reality. The data feed is so loud that our soul is tricked into believing reality is a linear progression, yet we have an aspect of each of us which exists in 'greater-than-linear' reality.
As Alamo_Girl is known to write, without space things do not exist, and without time events do not occur. Just imagine what 'things' and 'events' are possible in a reality which has temporal expressions of planar and volumetric expression alongside linear temporal expression!