Ps 18:6

“By heavenly power and co-operation, like a sun ray, the saving Word quickly illumined the whole earth. Straightway, in accordance with the divine Scripture, the voice of its inspired Evangelists and apostles "went forth to the whole earth and their words to the end of the world." And then in all the cities and villages, churches were quickly established, filled with multitudes of people, like a teeming threshing floor, and all those souls, bound through hereditary succession and original error by the ancient disease of idolatrous superstition, on being set free as it were from terrible masters and finding release from most difficult bondage by the power of Christ through both the teaching of his disciples and their wonderful works, rejected all demoniacal polytheism and confessed that there was one God alone, the Creator of all things, and this One they honored with the rites of true piety through inspired and rational worship that was implanted by our Savior in the life of people.”

“Christ fills his world with copious lights, since "his going out is from the end of heaven, and his circuit even to the end of it, and there is no one who can hide himself from his heat." Benignly he gives light to all, wishing not to repel the foolish but to correct them and desiring not to exclude the hard of heart from the church but to soften them. Hence … Christ in the Gospel invites them, saying, "Come to me, all you who labor, and are burdened, and I will give you rest. Take my yoke on you, and learn from me, for I am meek and humble of heart."”

“"His going forth is from the highest heaven" [Psalm 19:6]. From the Father is His going forth, not that in time, but from everlasting, whereby He was born of the Father. "And His meeting is even to the height of heaven." And in the fullness of the Godhead He meets even to an equality with the Father. "And there is none that may hide himself from His heat." But whereas, "the Word was even made flesh, and dwelt in us," [John 1:14] assuming our mortality, He permitted no man to excuse himself from the shadow of death; for the heat of the Word penetrated even it.”

“Someone lights a lamp.… That lamp, as far as regards the little flame that shines there, that fire has light in itself.… When the lamp was not there, your eyes were inactive and saw nothing. Now they, too, have light, but not in themselves. Accordingly, if your eyes turn away from the lamp, they are darkened. If they turn toward it, they are enlightened. But that fire, as long as it exists, emits light; if you wish to take the light away from the fire, you extinguish it also at the same time; for without light it cannot remain in existence. But the light, Christ, is inextinguishable and co-eternal to the Father, always glowing, always shining, always burning; for if he did not burn, would it be said in the psalm, "There is no one who can hide from his heat"?”

“And he is like a bridegroom coming forth from his chamber: – In the morning as he comes out in his brightness and beauty he is like a bridegroom coming forth from his chamber, for all rejoice before him; so of the sun, all rejoice at his light. And my revered father – may his memory be blessed! – has interpreted that the Psalmist compares him to a bridegroom coming forth from his chamber because the latter is longing to return to his bride, and so the sun returns each day to the place of his brightness. The text also likens him to a strong man, and says: He rejoiceth as a strong man to run his course: – because he does not stumble in his running. And he says, He rejoiceth as a strong man, for the strong man rejoices and is glad on going out to war. And so it says in mentioning the strength of a horse: “he rejoiceth in his strength: He goeth out to meet the armed men” (Job 39:21); so the sun rejoices in his going forth. His rising and shining and brightness are the rejoicing and gladness.”

“Sun. Here God seems to reside, (Ferrand) and the magnificence of his works shines forth, insomuch that almost all nations have offered divine honours to the sun, and even the Manichees adored it, imagining that it was the very body of Jesus Christ. (St. Augustine, contra Faust. xiv. 12., and xx. 6.) — Hebrew, “For the sun he has place a tent in them,” the heavens, (St. Jerome; Haydock) or the ends of the world. The Jews supposed that the heavens rested, like a tent, upon the earth. (Calmet, Diss.) — The Hebrew preposition l, may have (Haydock) different meanings, ad solem posuit, &c. “He placed a tent in them, at or for the sun.” The idea of the Vulgate is more noble, but we would not exclude the other, which is very good, (Berthier) and obviates the gross mistake of the Manichees. (Amama) — The Vulgate may admit the fig. hypallage, (M. Geneb.) as good authors say dare classibus austros, and thus it may signify “he placed the sun in his tent.” (Haydock) — This vast body stands in need of no vehicle, or tent, but itself. (Diodorus) — It was placed in the firmament at first, (Genesis i. 16.) and still performs its revolutions exactly. (Haydock) — Giant. Moderns would render “a strong man;” and Bythner remarks that the bulk of a giant would render him less fit for running, as if the stoutest wrestlers were not often the most active. (Berthier) — The sun is represented as a hero at some of the ancient games. St. Augustine and St. Jerome explain all this of Jesus Christ, who diffuses the light and warmth of his grace throughout the world. (Calmet) — He always resides with the Church, and is never divorced from her. (Worthington)”

“the sun is not said by them to ascend but to go out, for the scripture saith: The sun goeth out upon the earth, not goeth up; and again he says: From the end of heaven is his going forth, and at the end of heaven is his goal, Not a going up then—but if it is circular, it has not an end—for where are we to find an end of what is perfectly round?”