'And I will pray the Father, and he shall give you another Comforter,
that he may abide with you for ever;'
John 14:16
Remember that Jesus was saying these things to His disciples so that they would not be offended. Jesus is speaking to His disciples about the Holy Spirit, who is the Comforter. The ministry of the Holy Spirit in the life of the believer is the front line of defense against the devil and his devices of defeat. The phrase, 'The God of all comfort' carries the idea of a divine comforter who encourages, refreshes, strengthens, aids, assists, and is an ever present help in the time of need. The ways that God chooses to comfort are not always the same. He may deliver you or remove the cause of the affliction, or He may comfort you with words giving you a hope for the future. He also uses people to share their faith with you by prophesying. He sends fellow-laborers to serve and strengthen you by the ministry of the Word, and uses the body of Christ as a channel to comfort you, using prayer.
The point is that the source of all comfort is God, no matter what channel He chooses to use. Andrew Womack