Apophatic Prayer
Dionysius the Areopagite · c. 5th–6th century
Dionysius taught the oldest and boldest way of unknowing: to let go of every sense, image, and concept, and rise in pure surrender toward the 'brilliant darkness' where God dwells, beyond all that the mind can hold.
How long?
Sound
Tradition calls the author Dionysius the Areopagite; scholars date the works to the late 5th–6th century (“Pseudo-Dionysius”).
Pseudo-Dionysius the Areopagite, The Mystical Theology, ch. 1 (trans. John Parker).