John Chrysostom, on 1Cor 1:30

"But of Him are ye in Christ Jesus, who was made unto us wisdom from God, and righteousness, and sanctification, and redemption."

The expression "of Him," I suppose he uses here, not of our introduction into being, but with reference to the faith: that is, to our having become children of God, "not of blood, nor of the will of the flesh." "Think not then, that having taken away our glorying, He left us so: for there is another, a greater glorying, His gift. For ye are the children of Him in whose presence it is not meet to glory, having become so through Christ." And since he has said, "The foolish things of the world He chose, and the base," he signifies that they are nobler than all, having God for their Father. And of this nobility of ours, not this person or that, but Christ is the cause, having made us wise, and righteous, and holy. For so mean the words, "He was made unto us wisdom."

Who then is wiser than we are who have not the wisdom of Plato, but Christ Himself God having so willed.

But what means, "of God?" Whenever he speaks great things concerning the Only-Begotten, he adds mention of the Father, lest any one should think that the Son is unbegotten. Since therefore he had affirmed His power to be so great, and had referred the whole unto the Son, saying that He had "become wisdom unto us, and righteousness, and sanctification and redemption;" through the Son again referring the whole to the Father, he saith, "of God."

But why said he not, He hath made us wise, but "was made unto us wisdom?" To show the copiousness of the gift. As if he had said, He gave unto us Himself. And observe how he goes on in order. For first He made us wise by delivering from error, and then righteous and holy, by giving us the Spirit; and He hath so delivered us from all our evils as to be "of Him." and this is not meant to express communication of being, but is spoken concerning the faith. Elsewhere we find him saying, "We were made righteousness in Him;" in these words, "Him who knew no sin He made to be sin for us that we might be made the righteousness of God in Him;" but now he saith, "He hath been made righteousness unto us; so that whosoever will may partake plentifully." For it is not this man or that who hath made us wise, but Christ. "He that glorieth," therefore, "let him glory in Him," not in such or such an one. From Christ have proceeded all things. Wherefore, having said, "Who was made unto us wisdom, and righteousness, and sanctification, and redemption," he added, "that, according as it is written, he that glorieth, let him glory in the Lord."