To come to the knowledge you have not you must go by a way in which you know not. - John of the Cross

The soul that desires God to surrender himself to it entirely must surrender itself entirely to him without keeping anything for itself.

3. To prove the truth of the first reason, we take for granted a principle of the philosopher, namely, the more clear and evident divine things are, the more dark and hidden they are to the soul naturally. Thus the more clear the light the more does it blind the eyes of the owl,3 and the stronger the sun’s rays the more it blinds the visual organs; overcoming them, by reason of their weakness, and depriving them of the power of seeing. So the divine light of contemplation, when it beats on the soul, not yet perfectly enlightened, causes spiritual darkness, because it not only surpasses its strength, but because it blinds it and deprives it of its natural perceptions.

Letter 33 [To a discalced Carmelite nun in Segovia[63] Ubeda, October-November 1591] ... Have a great love for those who contradict and fail to love you, for in this way love is begotten in a heart that has no love. God so acts with us, for he loves us that we might love by means of the very love he bears toward us. [63] This person's identify is unknown.