Theophylact of Ohrid — on Rom 8:26 (Commentary on Romans)

“Having mentioned patience, he encourages the listener and says that the Spirit also helps us. Therefore do not grow weary in hope and patience: you bring only hope and patience, and the Spirit helps you. He shows how the Spirit helps in our weaknesses. We are so weak that we do not even know what we should pray for. All of us in general are so weak; so weak am I, Paul, as well. For Paul also prayed for deliverance from the "thorn in the flesh" (2 Cor. 12:8) and to come to Rome (Rom. 1:10), and Moses prayed to see Palestine (Deut. 3:23–25), and Jeremiah prayed for the Jews (Jer. 11:14), not knowing what was necessary. Paul says this now because at that time the believing Romans, being subjected to persecutions and insults, naturally desired rest, and not receiving it, fell into despondency. So then, he proves that no one among men knows what it is profitable to ask for. Therefore, he says, you must endure, and what is profitable for you, this the Spirit alone knows. For this reason he adds the following as well. In antiquity, God bestowed upon the baptized many and various gifts, which were generally called "spirit." One had the gift of prophecy, another the gift of wisdom, yet another some other gift. In exactly the same way, God also bestowed the gift of prayer, which was likewise called "spirit." Since, not knowing many things beneficial for us, we ask for what is useless, in the earliest times the gift of prayer would descend upon some one person, who alone would pray and also teach others to ask for what was beneficial for all. So by "spirit" he means here a gift of this kind, and a soul that has received the gift of prayer, that intercedes before God and groans. For such a spiritual man would stand with great contrition and with powerful groaning. Now we see a sign of this in the deacon, who standing offers earnest supplications on behalf of the people.”