The book Confessions was the first autobiographical work written around 400 A.D. during Saint Augustine's early 40's. Augustine discussed his regrets for following the Manichaean religion and believing in astrology.
Confessions is the most complete record of any single person from the 4th and 5th centuries.
The Confessions of Saint Augustine

The book starts off with his early childhood, where he reflects on the inherent violence of children, caused by original sin (chrisitan belief that man is sinful). There’s a parallel with other philosophies. Most philosophies/religions realize that on this basis, humans are flawed. These flaws seem to follow from how we evolved. And so a big part of what these philosophies try and solve is exactly how to overcome our basic urges.
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