Ps 103:26

“"There shall go the ships" [Psalm 104:26]. Lo, ships float upon that which alarmed you, and sink not. By ships we understand churches; they go among the storms, among the tempests of temptations, among the waves of the world, among the beasts, both small and great. Christ on the wood of His cross is the Pilot. "There shall go the ships." Let not the ships fear, let them not much mind where they float, but by Whom they are steered. "There shall go the ships." What voyage do they find tedious, when they feel that Christ is their Pilot? They will sail safely, let them sail diligently, they will reach their promised haven, they will be led to the land of rest.”

“And because God, when he created him, was certainly not ignorant of his future malignity, and foresaw the good which he Himself would bring out of his evil, therefore says the psalm, "This leviathan whom Thou hast made to be a sport therein," that we may see that, even while God in his goodness created him good, he yet had already foreseen and arranged how he would make use of him when he became wicked.”

“There is a passage, too, in the Book of Job, of which the devil is the subject: "This is the beginning of the creation of God, which he made to be a sport to his angels," which agrees with the psalm, where it is said, "There is that dragon which Thou hast made to be a sport therein." But these passages are not to lead us to suppose that the devil was originally created to be the sport of the angels, but that he was doomed to this punishment after his sin. His beginning, then, is the handiwork of God; for there is no nature, even among the least, and lowest, and last of the beasts, which was not the work of Him from whom has proceeded all measure, all form, all order, without which nothing can be planned or conceived. How much more, then, is this angelic nature, which surpasses in dignity all else that he has made, the handiwork of the Most High!”

“Furthermore, the words "The sea also, great and wide, where ships move about" are not to be understood relative to the ships of wood that are carried over the sea by the force of the wind but to the catholic church. While the latter desires to reach the port of paradise by holy, just works, it is beaten by many waves of tribulation and the winds of various storms. Moreover, although it is tossed by the violent beating of the winds, it is so well directed by the oars of holy discipline, so well driven by the breath of the Holy Spirit, that it is carried to eternal life by the Festal very adversities that oppose it. In this sea there is also that dragon of which it is written: "This sea dragon that you formed to make sport of it." That dragon is understood as the devil. He is apt to play in the wicked in such a way that not only does he persuade them to sin but, using them as his ministers, he does not cease to persecute even those who are holy and just. This dragon was made a good angel by God, but since he exalted himself against God by pride and fell from that happy angelic state, deceiving himself by pride, through God's hidden but just judgment he is permitted to deceive with his cunning careless people.”