For I know that this shall turn to my salvation through your prayer, and the supply of the Spirit of Jesus Christ,
I. THE SUPPLY. The Holy Spirit is the sole agent of the Saviour's will in the inward work of grace; nor is the indwelling and operation of Christ ever mentioned without the accompaniment of this truth. Not that the Spirit is supplied merely as an influence; He is both the Giver and the Gift; just as the Savior is the Victim and Priest. The gospel is a ministration of the Spirit by the Spirit, and the apostle hopes for the supply to his soul of all that grace which the Spirit, the Keeper of Christ's treasury, has to bestow.
II. THE PRAYER. He relies on the Philippians' intercessions, answering to those he always offered for them (ver. 4). It is simply His most graceful way of asking them to pray for him — not, simply with reference to the official work of the gospel, but to the good of his own soul. Mutual prayer is bound up with the very essence of the Christian system.
III. THE CONNECTION BETWEEN THE TWO. He seems to place himself between them and his Lord. The Spirit of Jesus flows unto him in proportion as the prayers of his fellow Christians and his own flow out towards Him in supplication. We are what the supply of the Saviour's Spirit makes us; that is the measure of our life, strength, perception of truth, performance of duty, and attainment in grace. But that is dependent on individual and common prayer; and the prayer for the Spirit is offered through the same Spirit in whom as well as for whom we pray.
(W. B. Pope, D. D.)
Parallel VersesKJV: For I know that this shall turn to my salvation through your prayer, and the supply of the Spirit of Jesus Christ,