Dougan Clark, The Theology of Holiness
“ The greatest gift that God the Son has given to man after He gave Himself for us is the gift of the Holy Ghost, for it is not only said, “I will pray the Father and He shall give you another Comforter,” and “whom the Father will send in My name,” but also, “If I depart I will send Him unto you,” so we may say in general terms, that the Holy Ghost as a personal sanctifier, energizer and Comforter, is the promise of the Father and the gift of the Son. And it may be added that the greatest gift of the Holy Spirit to man is the gift of entire sanctification or perfect love. ”
