John of the Cross wrote his extended prose treatise on the dark night while imprisoned by his own religious order in Toledo, in a cell barely large enough to lie down in, with inadequate light, poor food, and no reasonable expectation of release. The poem he composed during that imprisonment — "The Dark Night of the Soul" — is one of the most beautiful pieces of spiritual writing in any language. His prose commentary on it, written later, is a precise account of what the experience involves and what it is for.
The dark night is not, John is at pains to establish, the same as depression (though the two can overlap and can co-exist). It is not evidence of God's absence — it is, in John's account, evidence of a particular kind of God's presence. The felt sense of God's presence — the warmth, the sense of being loved and known, the ease of prayer — is a gift. It is not God himself. When God withdraws the gift of consolation, John argues, he is weaning the soul from a dependence on feeling and inviting it toward a deeper relationship based not on experience but on trust.
This is not a comfortable account. It is honest. The dark night feels like abandonment. The whole point is that it feels like abandonment while not being abandonment. The question John poses is: can you trust a God you cannot feel?
The Psalmist in Psalm 88 — the most unrelievedly dark of all the psalms, the one with no note of resolution at its conclusion — cries out:
Psalm 88:1–2, 13–18
ESVO LORD, God of my salvation; I cry out day and night before you. Let my prayer come before you; incline your ear to my cry... But I, O LORD, cry to you; in the morning my prayer comes before you. O LORD, why do you cast my soul away? Why do you hide your face from me? Afflicted and close to death from my youth up, I suffer your terrors; I am helpless. Your wrath has swept over me; your dreadful assaults destroy me. They surround me like a flood all day long; they close in on me together. You have caused my beloved and my friend to shun me; my companions have become darkness.
The psalm ends there. No resolution. No "but I will praise you" turn. Just darkness. And yet — the very act of crying out to God in the darkness is itself an act of faith. The Psalmist has not left. He is still addressing someone. The lament itself is the faith.