William of Saint-Thierry (around 1085-1148), Benedictine, then Cistercian Monk
From The Mirror of Faith 6
"When nature hesitates before mysteries of faith that are too deep, say without fear, not in opposition but with the desire to obey [like Mary]: “How can this be?” (Lk 1:34) May your question be a prayer; may it be love, piety, humble desire; may it not haughtily scrutinize the divine majesty, but may it seek salvation in the means of salvation given by the God of our deliverance.
“No one knows what lies at the depths of God but the Spirit of God.” (1 Cor 2:11). So hasten to be in communion with the Holy Spirit. He is there as soon as we call upon him. If someone calls upon him, it is because he is already present. When called, he comes; he comes in the abundance of divine blessings. It is he, the “stream whose runlets gladden the city of God.” (Ps 46:5)
If, when he comes, he finds you humble and without anxiety, but trembling at the word of God, he will rest upon you (Isa 11:2) and will reveal to you what God hides from the wise and prudent of this world. Then will begin to shine forth for you all the truths, which Wisdom could tell the disciples while she was on earth, but which they could not bear before the coming of the Spirit of truth, who would teach them the whole truth (Jn 16:12-13)."