The City of God, St. Augustine

In one introduction to the City of God by Etienne Gilson it is written that..."Many, perhaps most, readers never finish reading the City of God in its original form."  That will most likely be me!  I just picked it up Sunday afternoon because I can't just sit from 1:30 -7:00 watching softball and baseball and nothing else!  And while I love watching the "new two" play I can do more than one or two and sometimes three things at a time.
So, wow, I am only in the forward and even though it is abridged for modern readers it is slow go. Read and re-read for sure.
I am though already so revived mentally by what I have read.  The following paraphrase is what I want to share.  Indulge me with your time and even a comment or two.
This is from the foreword by Vernon Bourke:  ...through the one ancestor, from whom all men are sprung, this unity...is not just an ideal..but a fact....instead of considering themselves bound together by a mere likeness of nature ,men are conscious of a real family bond.  None of the faithful could doubt that all men, regardless of race, color or appearance, have their origin in the first man created by God.  There was no doubt in St. Augustine's mind that God Himself had created the human race in this way so that men might understand how pleasing unity, even in diversity, was to God, nor could they doubt that their unity was a family unity.  Thus, men are naturally brothers in Adam even before being supernaturally brothers in Christ; of this we are assured by faith.