Gregory the Dialogist : Men then sing of the Lord, when either spirits from above, or perfect teachers, make known to us His power. But yet His work is not known; because doubtless even they who preach Him, venerate His unpenetrated judgments. They, therefore, both know Him, Whom they preach, and yet know not His works: because they know, by grace, Him, by Whom they were made, but yet cannot understand His judgments, which are wrought by Him even above their understanding. For that Almighty God is not clearly seen in His doings the Psalmist bears witness, saying, Who hath made darkness His secret place. And again, Thy judgments are a great deep. And again, The deep like a garment is His clothing. Whence also it is well said by Solomon, As thou knowest not what is the way of the spirit, nor how the bones grow together in the belly of her that is with child, so thou knowest not the works of God, Who is the Maker of all things. — Morals on the Book of Job, Book 27 Jerome : "As you do not know what is the way of the spirit, nor how the bones do grow in the womb of her that is with child: even so you know not the works of God who makes all. "Just as you do not know the way of the spirit and of the soul entering a child, and are unknowing of the types of bone and veins in the stomach of a pregnant woman. It is hard to know how the human body is formed from the simplest elements into the many varied forms and limbs, and from the very same seed, one makes soft our hair, another makes our bones hard; one connects the veins, another links the nerves together. Thus you cannot know the work of God, who has made all things. From this he teaches that the variety of things in the world must not be feared, and you must not fear the winds and the clouds, which as we have mentioned above must be judged. But although the sower ought to reap in the course of his career, he ought to save the outcome for the judgement of the Lord. — Commentary on Ecclesiastes