Ascent of Mount Carmel () is a 16th-century spiritual treatise by Spanish Catholic mystic and poet Saint John of the Cross. The book is a systematic treatment of the ascetical life in pursuit of mystical union with Christ, giving advice and reporting on his own experience. Alongside another connected work by John, entitled The Dark Night, it details the so-called Dark Night of the Soul, when the individual Soul undergoes earthly and spiritual privations in search of union with God. These two works, together with John's The Living Flame of Love and the Spiritual Canticle, are regarded as some of the greatest works both in Christian mysticism and in the Spanish language. Written between 1578 and 1579 in Granada, Spain, after his escape from prison, the Ascent is illustrated by a diagram of the process outlined in the text of the Soul's progress to the summit of the metaphorical Mount Carmel where God is encountered. The work is divided into three sections and is set out as a commentary on four poetic stanzas by John on the subject of the Dark Night. John shows how the Soul sets out to leave all worldly ties and appetites behind to achieve "nothing less than transformation in God". Text of Dark Night of the Soul Considered to be his introductory work on mystical theology, this work begins with an allegorical poem, Dark Night of the Soul. The rest of the text begins as a detailed explanation and interpretation of the poem, but after explaining the first five lines, John thereafter ignores the poem and writes a straightforward treatise on the two "active nights" of the soul. The poem is as follows: Influence John's spiritual method of inner purgation along the 'negative way' was an enormous influence on T. S. Eliot when he came to write the Four Quartets. John's poem contains these famous lines of self-abnegation leading to spiritual rebirth: To reach satisfaction in all desire its possession in nothing. To come to possession in all desire the possession of nothing. To arrive at being all desire to be nothing. To come to the knowledge of all desire the knowledge of nothing. To come to the pleasure you have not you must go by the way in which you enjoy not. To come to the knowledge you have not you must go by the way in which you know not. To come to