Verse 4. Who comforteth us. Paul here doubtless refers primarily to himself and his fellow-apostles as having been filled with comfort in their trials; to the support which the promises of God gave; to the influences of the Holy Spirit, the Comforter; and to the hopes of eternal life through the gospel of the Redeemer.

That we may be able to comfort, etc. Paul does not say that this was the only design which God had in comforting them, that they might be able to impart comfort to others; but he does say that this is an important and main purpose. It is an object which he seeks, that his people in their afflictions should be supported and comforted; and for this purpose he fills the hearts of his ministers with consolation; gives them personal experience of the sustaining power of grace in their trials; and enables them to speak of what they have felt in regard to the consolations of the gospel of the Lord Jesus.

By the comfort, etc. By the same topics of consolation; by the same sources of joy which have sustained us. They would have experience; and by that experience they would be able to minister consolation to those who were in any manner afflicted. It is only by personal experience that we are able to impart consolation to others. Paul refers here undoubtedly to the consolations which are produced by the evidence of the pardon of sin, and of acceptance with God, and the hope of eternal life. These consolations abounded in him and his fellow-apostles richly; and sustained by them he was able also to impart like consolation to others who were in similar circumstances of trial.