A newsletter of short meditations on mortality, attention and living deliberately, drawing on Stoic and other philosophical and religious writers such as Seneca, Epictetus, Simone Weil and Marcus Aurelius. It includes book chapters, a weekly Seneca letter series with practices, and podcast versions, with some content for members only.

Donald J. Robertson, a cognitive-behavioural therapist, explains Stoic philosophy and its practical techniques, drawing on ancient sources such as Seneca, Marcus Aurelius and Musonius Rufus. Readers get articles, course lessons and commentary on how Stoic exercises compare with modern psychotherapy.

The Stoa Letter publishes essays and podcast notes applying Stoic philosophy, and occasionally Buddhist practice, to modern questions and daily resilience. A reader gets close readings of Marcus Aurelius and Epictetus, plus discussion of how ancient ideas bear on topics like AI ethics and mindfulness.

Ryan Holiday writes essays applying Stoic philosophy to personal growth, reading habits, endurance challenges and everyday life. Readers get reflective, anecdote-driven pieces drawing on historical figures, plus occasional promotion of his books and courses.