The Comforter is the Holy Ghost, who is our helper. Jesus is the one who baptizes with the Holy Ghost. The Holy Ghost is the “Spirit of Truth”, and He moved on men of old, starting with Moses, to write the Word of God that we now have. The Father sent the Holy Ghost in the name and authority of Jesus Christ. Even today, He is still testifying about what Jesus did on the cross of Calvary.
(Read Matthew 3:11-12)