Psalms 72:18

But whoever would be disposed to look for something more profound in the words of Christ, "If I had not done among them the works which none other man did" (for although such were done by the Father, or the Holy Spirit, yet no one else did them, for the whole Trinity is one and the same in substance), he will find that it was He who did it even when some man of God did something similar. For in Himself He can do everything by Himself; but without Him no one can do anything. For Christ with the Father and the Holy Spirit are not three Gods, but one God, of whom it is written, "Blessed be the Lord God of Israel, who only doeth wondrous things." No one else, therefore, really himself did the works which He did amongst them; for any one else who did any such works, did them only through His doing. But He Himself did them without any doing on their part.

"Blessed be the Lord God of Israel, who hath done wonderful things alone" [Psalm 72:18]. Contemplating all things above spoken of, a hymn bursteth forth; and the Lord God of Israel is blessed. For that is being fulfilled which hath been spoken to that barren woman, "and He that hath delivered Thee, the God of Israel, shall Himself be called of the whole earth." "He doeth" Himself "marvellous things alone:" for whosoever do them, He doth Himself work in them, "who doeth wonderful things alone."