Cyril of Jerusalem

Jesus sanctified Baptism by being Himself baptized. If the Son of God was baptized, what godly man is he that despiseth Baptism? But He was baptized not that He might receive remission of sins, for He was sinless; but being sinless, He was baptized, that He might give to them that are baptized a divine and excellent grace. …

''Catechetical Lectures, Lecture 3'' ↗

Gregory the Dialogist

He will drink up a river, and will not wonder, and trusteth that Jordan can flow into his mouth. 12. For what is in this place designated by the name of 'river,' except the downward course of the human race, which rises at its birth, as if from the source of its fountain, but passes down, as if flowing to its lowest level at its death? But who are signified by the expression 'Jordan,' except those who have been already imbued with the sacrament of Baptism? …

Morals on the Book of Job, Book XXXIII ↗

Thomas Aquinas

For the same reason this animal seeks humid and shady places, he also drinks a lot of water, and so Aristotle says in The History of Animals VII that, "Now an elephant drinks fourteen Macedonian measures of water as a draft and again later another eight." So to describe the great quantity of his drink he says, "He will swallow rivers and not wonder," because he is used to drinking a lot of water, and after he drank a lot, he expects to drink even more, and so he says, "he presumes he can pour the Jordan into his mouth," which is a …

Commentary on Job ↗