The Dark Night of the Soul: A Psychiatrist Explores the Connection Between Darkness and Spiritual Growth

The Dark Night of the Soul: A Psychiatrist Explores the Connection Between Darkness and Spiritual Growth - Gerald G. May

Very readable introduction to the spirituality of St. Teresa of Avila and St. John of the Cross and the dark night of the soul. Painful as it may be, May shows it is also a blessed place  for the fruits it brings.