First, my thanks to my friend Matt for recommending this book!
Dark Night of the Soul is a treatise on a phenomenon which occurs during the course of Christian spiritual devotion. I should point out that the 'dark night' to which John of the Cross, the author of the treatise, refers has nothing to do with what is commonly thought to be the 'dark night of the soul', which is a profound experience of depression. While the image of a 'long dark night of the soul' is apt as a metaphor for depression (it is almost as good as Winston Churchill's 'black dog'), that is not to what John of the Cross refers in his treatise on the 'dark night of the soul'. Part of what I will be doing, then, is clarifying what John of the Cross means when he talks about the 'dark night'.
In addition, Dark Night of the Soul is a companion of another of John's treatises on spirituality, The Ascent of Mount Carmel. I will have little to no recourse to that work in this marginal commentary, however.
The edition of Dark Night of the Soul in my possession and from which I shall quote passages is part of a collection of John's works, published in 1979 by the Institute of Carmelite Studies, and translated and edited by a pair of Carmelites (of the Order of Discalced Carmelites), Kieran Kavanaugh, O.C.D., and Otilio Rodriguez, O.C.D. (I should mention that in this collection, the work is entitled The Dark Night) John of the Cross, a Spanish mystic, is considered one of the founders of the Discalced Carmelites. Incidentally, John of the Cross, along with Teresa of Avila, is commemorated in the Anglican Church of Canada on October 15.
And now, on to discover what is the dark night of the soul.