" Let not thy left hand know what thy right hand doth,”2 may be, in a spiritual sense, understood of this, and we may understand Him to say: Let not thy left hand, that is man’s lower nature, know what is passing in the higher and spiritual part of the soul. That is, let the divine communications remain unknown to the lower senses, and a secret between the spirit and God. "

― Juan de la Cruz , Dark Night of the Soul