Rich, I am actually planning to publish a short piece on just that topic soon (submitted to the editor this week!). Meanwhile, the issue is addressed by Pierre Hadot in his masterful “Philosophy as a Way of Life” as well as by Donald Robertson, who is both a CBT therapist and a Stoic practitioner, here: https://www.goodreads.com/book/show/10140570-the-philosophy-of-cognitive-behavioural-therapy