John Chrysostom

"For we have been made partakers of Christ." What is this, "We have been made partakers of Christ"? We partake of Him (he means); we were made One, we and He - since He is the Head and we the body, "fellow-heirs and of the same body; we are one body, of His flesh and of His bones." "If we hold fast the beginning of our confidence [or, the principle of our subsistence] steadfast unto the end." What is "the principle of our subsistence"? …

Homily on Hebrews 6 ↗

Theophylact of Ohrid

That is, we and He became one, and we became partakers of Him to the same degree that the body is of the head. Here he inspires them with hope, as if saying: He Who loved us so much that He even made us His body will not allow us to be torn away from Him, if only we ourselves do not desire it. At the same time he hints at what is said in another place: "if we endure, we shall also reign with Him" (2 Tim. 2:12). …

Commentary on Hebrews ↗

Oecumenius

"For we have become partakers of Christ." One, he says, we have become partakers with Christ, since He has deemed it worthy to be our head and to make us His members. "if we hold the beginning of our confidence." The beginning of confidence is faith towards Christ. For by it we have endured and have become partakers of Christ. "to the end." The 'to the end' clearly indicates that they had begun.

The Pseudo-Oecumenian Catena on Hebrews ↗

Thomas Aquinas

188. – Then (v. 14) he explains their condition. As if to say: That condition is more powerful than the other, because they only hear, but we share in Christ. And he speaks properly, because in the Old Testament, there was only hearing, and grace was not conferred ex opere operato; but in the New Testament there are both the hearing of faith and the grace given to the very one acting. Hence, we are partakers of grace, first, by accepting the faith: 'That Christ by faith may dwell in your hearts' (Eph. …

Commentary on Hebrews ↗