Before this the Apostle expressed the desire that the Ephesians be filled with every fullness of God. This fullness of God, or fullness of blessings descending to us from God in Christ Jesus, is partly depicted by the Apostle in the Epistle. It is partly expressed by him in this prayer, and the Ephesians also surely knew and understood it in part.
The Apostle now says: what I wrote to you, what I prayed and still pray for, and what you yourselves comprehend and seek, all this is great. Yet it in no way exhausts the treasury of blessings granted to us through the Lord Jesus Christ. They are incomparably greater than we can comprehend or ask. The Lord can pour them all out upon anyone on whom He is well pleased.
What has already been poured out you yourselves experience. You see it in me and hear of it being worked in the other Apostles. Do you see how it acts? In some unknown way power comes and manifests its action, either only in the soul, enlightening and purifying, or outwardly also, working miracles. This is not from us. It is God's gift. No measure can be set to it. If it were measured by our capacity, one might still determine a measure. But since its measure is God's boundless goodness and all-effectual power, who will set a measure or boundary to it? God's treasury is immeasurable, and He is ready to empty it all upon us.
With such a thought, could the Apostle fail to cry out, "To Him be glory"? "Beyond all" should mean "beyond everything." Together with "exceedingly abundantly," it expresses this: incomparably more than all that we ask or understand. "According to the power that works in us" expresses the basis for the Apostle's statement. He answers, as it were, the question: "How is it evident that God can do this for us?" "From the power," he says, "that works in us, for we never asked or expected this" (Saint Chrysostom).
"In us" means in whom? Either chiefly in the Apostles, or in all believers in the Church, so as to say: Christianity, faith in Christ, has given and gives much to all. And what it can still give has no measure. Elsewhere the Apostle says: "all things are yours" (1 Cor 3:21-22).