Leave the senses and workings of the intellect, and all that the senses and intellect can perceive, and all that is not and that is; and through unknowing reach out, so far as this is possible, towards oneness with Him who is beyond all being and knowledge. In this way, through an uncompromising, absolute and pure detachment from yourself and from all things, transcending all things and released from all, you will be led upwards towards that radiance of the divine darkness which is beyond all being.
Entering the darkness that surpasses understanding, we shall find ourselves brought, not just to brevity of speech, but to perfect silence and unknowing.
Emptied of all knowledge, man is joined in the highest part of himself, not with any created thing, nor with himself, nor with another, but with the One who is altogether unknowable; and, in knowing nothing, he knows in a manner that surpasses understanding.
—Dionysius the Areopagite, The Essential Mystics