I remember the first time I actually read through the Bible I was startled from my preconceived idealistic thinking that all of God's chosen were perfect specimens beyond reproach.
It was humbling & healing to find them broken men & women ...like me, some flawed beyond measure... sinners saved by God's Grace alone.
Sounds like this is what the book is referencing.
As John Piper says..."We are all broken"....
..and only God's redeeming love can save us.
Thank God...