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Your "author" sounds like Gerald Schroeder ("Genesis and the Big Bang")...
We agree; relativity makes it possible for me to be comfortable with both the Biblical account of creation -- and, with our measured/estimated age of the universe of 13.7 +/- billion years. In fact, that is how I illustrated the concept in this frame from my graphical presentation/movie-in-progress,
"GENESIS I: The Most Outrageous Claims Ever Made
...a scientist looks at the first four verses..."
I note that I FTP'd that image into my domain's webspace on 31-Aug-2013 -- and I'm still working on the presentation... '-)
Of course, it is nigh-unto impossible for us to define the Creator's reference frame. (I assume that, at minimum, He occupies another dimension -- and, is not [as we are] constrained by "C" , the speed of light...)
You are right, Gerald Schroeder. It is a powerful idea, on a par, IMO, with the anthropic principle, or intelligent design.
I hope more people give thought to Schroeder’s idea and independently examine his time-line of events.
You might be interested in The Mind & The Brain Neuroplasticity and the Power of Mental Force, by Jeffrey Schwartz, MD:
https://www.amazon.com/Mind-Brain-Neuroplasticity-Power-Mental/dp/0060988479
From quantum mechanics (Schrödinger’s cat mentioned), to the firing of a neuron, to the development on neural nets, the author examines the physiological impact of our thoughts/decisions.
We can all visualize body builders. On a more mundane level, I quickly gain weight with a full course restaurant meal, and lose slowly by avoiding sweets and remaining active. It turns out that we are all body builders - and brain builders too.