Comforter, the title of the Holy Spirit, the third Person in the Trinity, the Apostle applies to God: God that comforteth those that are cast down, comforted us. (2 Cor. 7:6) The Holy Spirit therefore Who comforts those that are cast down, is God. Or if they will have this said by the Apostle of the Father or the Son, let them not any longer separate the Holy Spirit from the Father and the Son, in His peculiar office of comforting.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: contr. Serm. Arrian. c. xix.