Genesis 19-24
In Genesis 20 Abraham takes things into his own hands by saying Sarah is his sister for the second time. To me this is why it is so easy to believe the Bible is true. The "heroes" of the faith are shown "warts and all". They are never portrayed as larger than life. God chose Abraham to be the father of His people knowing that he was an imperfect man who would often fail in his faith. But God just keeps showing him grace.