Mad Am I?

From the introduction:

In the early 1800s, the young Oleander Mars, educated for both a career in medicine and the Anglican church, sought to combine these in a quest to cure insanity. While deep in prayer, he experienced an epiphany and saw a vision of letters and numbers: DT28:28. Interpreting this as a reference to Deuteronomy, he took the indicated verse to be proof that madness was caused by moral failure to follow the Ten Commandments, thus falling “off track” with Creation and, therefore, becoming mad.