St. Augustine: "Unity of heart"

“FOR there is nothing so social by nature, so anti-social by sin, as man. And if any man should ever need an argument against the evil of dissension, either to prevent it breaking out or to bring it to an end, there is nothing better than to recall that single father of all our human race who God created as a solitary individual, for the purpose of reminding us to preserve unity of heart in a multitude of men. And the fact that a woman was made from the side of the man shows clearly enough how highly we were meant to esteem the relationship between husband and wife.”

~St. Augustine: The City of God, 3, 12, 28.

Creation of Adam and Eve, by Lorenzo Ghiberti.
Gilded bronze, 1425-52; Baptistry, Florence.

Etienne Gilson: St. Augustine and "seminal reasons"

“WHEN Augustine speaks of the kind of existence those creatures have which were only preformed at the time of creation, he says that they were made “invisibly, potentially, causally, as future things which have not been made are made” (invisibiliter, potentitaliter, causaliter, quomodo fiunt futura non facta). The technical phrases he uses to designate this kind of existence are “rationes causales” or rationes seminales,” which are usually translated “seminal reasons.” Because of these hidden seeds which contain everything future ages are to see unfolded, the world created by God may be said to be pregnant with causes of beings still to come. In one sense, then the world was created complete and perfect, since none of the things seen in it escaped the creative act; but in another sense, the universe was only created in an unfinished state, because everything that was to appear in it later was created only in germ or seminal reason.”

~Etienne Gilson: The Christian Philosophy of Saint Augustine, Part III, Chap. II.

St. Irenaeus: "The world manifests Him who ordered it"

“FOR even creation reveals Him who formed it, and the very work made suggests Him who made it, and the world manifests Him who ordered it. The Universal Church, moreover, through the whole world, has received this tradition from the Apostles.”

~St. Irenaeus of Lyons:  Against Heresies, Bk. 2, Chap. 9.