Many of the insights of the saint stem from their experience as sinners.
But the issue is not only life and death but our existence before God and our being judged by him. All of us were sinners before him and worthy of condemnation.
Therefore don't let sinners take courage to think they will be favoured like the thief on the cross for we see on the other side they may be like the hardened one and reproach death itself.
The devil had as good have let Paul alone for he no sooner comes into prison but he falls a preaching at which the gates of Satan's prison fly open and poor sinners come forth.