What is Dark Night of the Soul about?

Dark Night of the Soul is a systematic commentary on a short poem John of the Cross wrote while imprisoned in Toledo in 1577. John — a Spanish Carmelite friar and contemporary of Teresa of Ávila — composed the poem during nine months of confinement under brutal conditions. The prose commentary, written in the 1580s, analyzes the poem's imagery line by line to describe what he understands as two stages of spiritual purification: the night of the senses and the night of the spirit. Together, these constitute the "dark night" — a period of dryness, confusion, and apparent abandonment that John believes is actually the primary means by which God purifies the soul and draws it toward union.

The first book addresses the night of the senses. John identifies seven ways that spiritual beginners typically indulge their attachment to spiritual consolations — what he calls the spiritual equivalents of the classic seven deadly sins. The spiritually proud person compares their practice favorably to others; the spiritually slothful person gives up when prayer becomes uncomfortable. John argues that God withdraws consolations precisely to free the person from dependence on good feeling and to begin the deeper work. The diagnosis is pointed: he suggests that most people who experience dryness in prayer are going through a dark night, not failing at their practice.

The second book addresses the night of the spirit — the deeper and more severe purification. Here the soul is stripped of its habitual ways of knowing and loving God. The experience is described as a darkness not because God is absent but because the divine light is too intense for the soul's current capacity, the way excessive brightness appears as darkness to damaged eyes. John draws on scholastic philosophy to explain why this is necessary: the soul must be emptied of its own projections and habits to receive a more direct knowledge of God.

The book is philosophically demanding but not inaccessible. John writes with precision and compassion — he clearly knows the territory from experience, not from theory alone. The concept of the "dark night" has passed into the general cultural vocabulary as a description of any period of deep desolation. John's original meaning is narrower and more specific: it is not all suffering, but a particular kind of suffering that accompanies spiritual growth. The distinction matters for how the experience is interpreted and endured.