I have not read enough of the book to make a reasonable evaluation of its usefulness but I will make this comment: I am 85 years old and have tried to lead a decent life based on reason and logic tempered by empathy, which I believe I have in relative abundance. Having said that, I must admit that I resent your slipping in snippets of your religiosity. I bought your book in the hope that from it I would gain in knowledge of the technology that is so pervasive in life today. That and nothing more. I respect your choice to believe in what to me are comforting mythical delusions. I submit that that respect is not reciprocated by your presumption that I would be receptive to your not-too subtle allusions to your beliefs. If you wish to proselytize I suggest you do it through a medium more specifically appropriate and revealing of your intentions in that regard.