John Chrysostom
Again, from what has happened, he confirms the truth of the future. "If," he says, "God Himself establishes us in Christ, that is, does not allow us to waver in faith in Christ, and Himself has anointed us and given the Spirit in our hearts, how will He not grant us the blessings promised in the life to come?
"If He has already given the beginning and foundation, the root and source of blessings, that is, true knowledge of Him and participation in the Holy Spirit, how will He not give those blessings that flow from this?
"Indeed, if even the present blessings that we enjoy were given for the sake of those we still await, then much more will the One who gave these blessings grant the expected ones.
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"And if He gave us the first blessings when we were still His enemies, then much more will He grant us the second now that we have become dear to Him."
For this reason the Apostle did not simply say "the Spirit," but added "the pledge," in order by this to assure us of receiving everything promised by God.
Indeed, if God did not wish to grant us everything He promised, He would not have been pleased to give the pledge, lest He lose it idly and in vain.
And see what sound-mindedness Paul has. "What further," he says, "must be said in confirmation that the truth of the promises does not depend on us? Even the fact that you stand firm and unshaken in faith does not depend on us, but on God.
"God," he says, "is the One who establishes you," βεβαιών, that is, we do not establish you, for we ourselves need One who establishes. Therefore no one should think that the truth of the preaching is endangered through us.
"The One who establishes us in faith has Himself taken everything upon Himself, and He Himself cares for all things."
What, then, does "having anointed and sealed" mean? It means that He has given the Spirit, through whom He accomplished both things, anointing and sealing. He made us at once prophets, priests, and kings, because in ancient times those who received these dignities were anointed.
But we now have not merely one of these dignities, but all three, and in a higher measure. We hope to receive the kingdom. We are made priests when we offer our bodies as a sacrifice to God.
The Apostle instructs this when he says: "Present your bodies as a living sacrifice, holy, acceptable to God" (Rom 12:1). Finally, we also become prophets, because what "eye has not seen, nor ear heard" has been revealed to us (1 Cor 2:9).
We can also be kings in another way, namely if we curb improper thoughts.
After these words, after the renunciation of the devil, after union with Christ, when you have henceforth become His own and have nothing in common with that other one, the priest commands that you immediately receive the seal. He traces the cross upon your forehead.
Since it is natural that the beast, on hearing these words, becomes still more savage, for he knows no shame, and wishes to rush at the very face, the priest restrains all his madness by depicting the cross on your face through anointing.
For he no longer dares to look directly upon that face. Seeing the rays that issue from there, he withdraws, blinded. The cross is depicted through anointing, and the anointing consists at once of oil and chrism.
Chrism is imparted to the soul as the bride of Christ, and oil as to a fighter against evil.
Again, that it is not a man but God Himself who anoints you by the hands of the priest, listen to Paul's words: "He who establishes us with you in Christ and has anointed us is God."
The reference is to anointing with oil as part of the mystery of baptism, and anointing with chrism, a fragrant composition of several substances, oil, aloe, myrrh, rose oil, and so forth. This is part of the mystery of Chrismation, the giving of the Holy Spirit to the newly baptized.