John Chrysostom
"And I will pray the Father, and He will give you another Comforter."
Again, the speech is accommodated to their weakness. Since the disciples did not yet know Him, they naturally desired greatly to be with Him, to hear His words, and to see Him in the flesh.
They found no consolation for themselves in anything, because they grieved over His departure. What then does He say? "And I will pray the Father, and He will give you another Comforter," that is, another such as I am.
Let those infected with the disease of Sabellius be ashamed, and also those who do not hold the proper understanding of the Holy Spirit.
What is especially wonderful in this saying is that with one stroke it overthrows heresies that are completely opposite to one another.
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By saying "another," He indicates the distinction of His hypostasis. By saying "Comforter," He indicates the unity of essence.
Why then does He say, "I will pray the Father"? Because if He had said, "I will send," they would not have believed as readily. At this point He was concerned that they should believe Him.
Later He declares that He Himself sends Him, saying, "Receive the Holy Spirit." But here He says, "I will pray the Father," in order to make the word credible for them.
For John says concerning Him that "of His fullness we all have received" (Jn 1:16). How then can He receive from another what He Himself possesses?
And again: "He will baptize you with the Holy Spirit and fire" (Lk 3:16).
What advantage would He have over the apostles, if He had to pray to the Father in order to give the Spirit to others?
The apostles often did this, as is evident, even without prayer. And if the Holy Spirit is sent from the Father through prayer, how does He descend of Himself?
How can He be sent by another who is everywhere present, who of Himself distributes gifts "to each one individually as He wills" (1 Cor 12:11), and speaks with authority: "Separate for Me Barnabas and Saul" (Acts 13:2)?
Although these ministers served God, He summoned them with authority to His own work. This was not because the work to which He called them was different, but to show His authority.
What then, you will say, does "I will pray the Father" mean? The time of the coming of the Holy Spirit is being shown.
When He had cleansed them by the sacrifice, then the Holy Spirit descended. Why did He not come while Christ was with them? Because the sacrifice had not yet been offered.
When sin had already been destroyed, and the apostles had received the command to go into dangers and were preparing for the contest, then the One who strengthens for struggles had to come.
Why then does the Spirit not come immediately after the Resurrection? So that the apostles might desire Him more intensely and receive Him with greater love.
As long as Christ was with them, they were not in grief. But when He departed, they were deprived of Him and were in great fear.
Naturally, then, they were to receive the Holy Spirit with great zeal. "That He may abide with you." This means that even after death He will not depart.
And lest, when they heard of the Comforter, they should suppose another new incarnation and hope to see Him with their eyes, Christ turns them away from this and says, "Whom the world cannot receive, because it does not see Him."
He will not be with you as I am. Rather, He will dwell in your very souls. This is what "He will be in you" means.
By calling Him the Spirit of truth, He indicates the figures that existed in the Old Testament. "That He may abide with you." What does "that He may abide with you" mean?
It means the same as what He says of Himself: "I am with you" (Mt 28:20).
Let us consider the reason for the present feast of Pentecost, and why we celebrate it. It is because the Spirit has descended to us.
As the Only-begotten Son of God is with faithful men, so also is the Spirit of God. How is this known?
"If you love Me," the Savior says, "keep My commandments. And I will pray the Father, and He will give you another Comforter, that He may abide with you forever, the Spirit of truth" (Jn 14:15-17).