1 Timothy 1:15 This is a faithful saying and worthy of all acceptance, that Christ Jesus came into the world to save sinners, of whom I am chief.

This is the first verse in First Timothy I have a remembrance about.
After reading the Book of Acts, I admired Paul for the change in his life.
It was a complete turn around.
Yet here, he talks about being the chief of sinners.
I suppose this is because of his former persecution of the church. (1 Cor. 15:9; Gal. 1:13; Php 3:6)
It is something Paul was forgiven for but something he never got over.
There were lives changed because of his pursuit of the church and he could not undo the damage and pain he inflicted on them.
There are things each of us have done in our lives to cause us embarassment and self-rebuke.
However, Paul used this persecution of the church as a testimony of the power of Christ to save him and turn his life around.
The same power of Christ exists for everyone today.
No sin is unforgiveable except that of unbelief.