See Second Prison Letter Response: Prayers borne of true faith never go unanswered to read the letter addressed by the above. Search for prison to read similar letters and their respective answers.
This letter was written as a work of repentance, in that is better to do (and not just say), “I’m sorry.” I’ve done nothing in particular that I haven’t done before, but that would be plenty be sorry for. I am thankful that, as usual, I’ve offended God only, and no man in particular, because I know He is where forgiveness lives.
A note about works of repentance
Repentance means not only acknowledging an offense against God…
Surely it is meet to be said unto God, I have borne chastisement, I will not offend any more.
…but also undergoing a course of action that demonstrates your willingness to bear any consequences of your wrongdoing and to remain ever mindful to avoid repeating it:
Bring forth therefore fruits meet for repentance.
Any action, of course, would be the kind of work that is most meaningful to God, and that is fruitful to you, as well as others:
Therefore, my beloved brethren, be firm (steadfast), immovable, always abounding in the work of the Lord [always being superior, excelling, doing more than enough in the service of the Lord], knowing and being continually aware that your labor in the Lord is not futile [it is never wasted or to no purpose].
It is also an offering of thanksgiving, and, in particular, for the good outcome of a long-term problem described in DOUBLE FOR MY TROUBLE | Stanford doctor doubles testosterone regimen.