Believe Not Every Spirit: Possession, Mysticism, and Discernment in Early Modern Catholicism Book

Every once in a while you come across a work that requires a bit more in the way of meditation and contemplation. Sufi books generally will have this characteristic, but some demand a concentration and internal focus that cannot necessarily be realized at all moments of the day. This is one of those books. I read it in the early morning hours just after waking up, when I had the most mental clarity and felt my surroundings most at peace. It's an amazingly insightful and penetrating book on the entirety of the spiritual path. It's one of the best I've seen thus far at attempting to put into words those things that are so often lacking in description.