I'm trying to convey the sense of a rare moment of tranquility in the mind of a confused, flawed and tormented character.
This is the most ataractically candid thing I've ever written.
This occurs at the end of a sincere, formal letter to a business partner asking for forgiveness.
I want to convey that the candour comes from the rare state of ataraxia the character is feeling at the time. Rare because they suffer from extreme bipolar disorder, and they are out of their mind more often than not.