The Holy Ghost
Who Dwelleth in Us (2 Tim. 1: 14)
WH Westcott
The Holy Spirit occupies a very special place in relation to Christians, distinct from anything set forth in Old Testament times or enjoyed by Old Testament saints; distinct from what was enjoyed by the disciples who companied with the Lord previous to His death, resurrection, and ascension; and distinct from what will be wrought in men (Israelites and Gentiles) after Christians are gone from the earth to the Lord; when the time will have come for the millennial reign of Christ, and its attendant glory and blessing.