Psalms 147:15

"He that sends his word on earth, until his word runs swiftly." He that sends is evidently distinct from him that is sent. You have then, here, both the Sender, the almighty God, and also the Word that was sent, who having many names is called by the holy oracles now Wisdom, now Word, now God, and also Lord. And as you know how in a very short time the word of his teaching has filled the whole world, I am sure you will wonder at the fulfillment of the prophecy, "Till his word runs swiftly."

Who sends forth his word to the earth. Answer, O Jew: if he was speaking of wheat, And he fills you with the fat of the wheat, how does he now say, Who sends forth his word to the earth? In the beginning was the Word. This Word is sent forth in the flesh. And the Word was made flesh, and dwelt among us. Who sends forth his word to the earth. At that time was fulfilled, The earth has given its fruit. Who sends forth his word to the earth. He is speaking of the preaching of the Gospel, of the teaching of the apostles. Then follows: Swiftly runs his word. For into all the earth his word was heard, and into the whole world the apostolic teaching. One poor man, already old, preached from Jerusalem all the way to Illyricum, and swiftly runs his word. Since, then, it had come from Jerusalem all the way to Illyricum, and his word had run swiftly, next it follows, and that very word which had said, From Jerusalem all the way to Illyricum, says: But I wish to go even to the Spains. This the apostle Paul speaks. See the swiftness of the word. He is not content with the east: he longs to run to the west.

"Who sendeth forth His Word to the earth." Behold, on earth we toil, weary, fainting, sluggish, cold: when should we be raised up to the fat of wheat that satisfieth, did not He send His Word to the earth, whereby we were weighed down, to the earth, whereby we were hindered from returning? He sent His Word, He deserted us not even in the wilderness, He rained manna from heaven. "Who sendeth forth His Word to the earth;" and to earth His Word came. How? or what is His Word? "Even unto swiftness His Word runneth." He said not, "His Word is swift," but, "His Word runneth even unto swiftness." Let us understand, my brethren: He could not have chosen a better word. He who is hot grows hot by heat, he who is cold grows cold by cold, he who is swift becometh swift by swiftness. ...To what degree then doth it run? "Even to swiftness." Increase as much as you will the swiftness of the Word, and say, It is as swift as this or that, as birds, as the winds, as the Angels; is any of these as great as swiftness itself, "even unto swiftness"? What is swiftness itself, brethren? It is everywhere; it is not in part. This belongeth to the Word of God, not to be in part, to be everywhere by Himself the Word, whereby He is "the Power of God and the Wisdom of God," before He had taken flesh upon Him. If we think of God in the Form of God, the Word equal to the Father, this is the Wisdom of God, of which is said, "It reacheth from one end to the other mightily." What mighty speed! "It reacheth from one end to the other mightily."...