Psalms 147:8

They must suppose that our ancestors went down into Egypt without bodies and invisible and that only the soul of Joseph was imprisoned by Pharaoh, because it is written, "They went down into Egypt with threescore and fifteen souls," and "The iron entered into his soul," a thing that could not be bound. They who argue thus do not know that such expressions are used by synecdoche, declaring the whole by the part, as when Scripture says that the young ravens call on God, to indicate the whole feathered race; or Pleiades, Hesperus and Arcturus are mentioned, instead of all the stars and his providence over them.

That you may be aware that God the Father worked not only on those first six days but "even until now," read the [saying] of the prophet, "Before I formed you in the womb, I knew you"; and in the psalm, "He who shaped the hearts of every one of them"; and elsewhere, "Who covers the heavens with clouds and prepares rain for the earth, who produces hay on the mountains," and other things of this sort. We must indeed note that [the psalmist] did not put the verb in the past tense, saying, "who covered and prepared and produced," but in the present, "he covers, prepares, produces" in order to demonstrate that the Father works every day, no less on the sabbath than on other days. So that you may not doubt that the Son works all things equally, recall that [saying] of the psalmist: "He spoke, and flies and gnats came; he spoke, and the locust and the grasshopper came; he spoke, and there stood forth the wind of a storm."

Who covers the heaven with clouds. This heaven, which we behold, cannot be covered with clouds. But there is another heaven, and there are other clouds. And your truth reaches even to the clouds. Then does the truth of God reach even to those clouds, which are quickly dissolved when the wind blows? The truth of God is Christ. I am the way and the life and the truth. Is then the truth of Christ in these clouds, which have not in themselves the substance of truth? Can it then be that truth is there, where the wind has power to scatter? I will command, he says, the clouds not to rain rain upon them—that is, upon the people of the Jews. The clouds are the prophets: the Lord commanded them not to rain rain upon Israel. The prophetic word has been turned toward us. These clouds, if they are dashed against one another, make thunder and lightnings. Who covers the heaven with clouds. Why did he say, He covers the heaven with clouds? If the clouds are prophets and apostles, how then is the heaven covered by apostles and prophets? The heaven is the divine mysteries. Since therefore the mysteries, whatever are divine, are called heaven: whoever is unworthy, these clouds protect the sacraments from him. If anyone is unworthy, he cannot receive the sacraments: they are covered by the clouds. Who prepares rain for the earth. The earth needs rain: our earth, unless it receives rain, the fountain of doctrines, will bring forth no fruit. When the earth has been moistened by a fountain of such doctrines, what follows? Who brings forth hay on the mountains. If he were speaking of hay alone, surely hay is born more in the valleys than on the mountainous places: for wherever the rain is more abundant, there hay is born more. From the mountains the waters flow down into the valleys, and grass is born more abundantly.