The dark night represents a stage where previous spiritual consolations disappear, leaving the soul in apparent desolation. Prayer becomes difficult, divine presence seems absent, and the seeker feels abandoned. Yet John argues this darkness serves a purifying purpose.
In the dark night, God withdraws sensory and intellectual consolations to purify the soul of attachments, even attachments to spiritual experiences. This painful process strips away everything extraneous, preparing the soul for union with the Divine through pure faith rather than felt experience.
The concept has influenced spiritual seekers across traditions and found resonance in depth psychology. It acknowledges that authentic transformation often involves periods of disorientation and loss, not just blissful ascent. The darkness itself becomes the path to light.
Source
Dark Night of the Soul - St. John of the Cross