“In addition to the Holy Spirit’s having as His distinctive name the Holy Spirit, it is definitely recorded that He is the Spirit of Holiness. Rom. 1:4. Isaiah declares He is the Spirit of judgment and the Spirit of burning. Isa. 4:4. The filth of the daughters of Zion and the blood which was upon that holy city were washed away and purged from the midst thereof by the spirit of judgment and by the spirit of burning. God is the enemy of sin wherever He finds it. In the heart of the believer He attacks it immediately. The Spirit of Holiness, as the spirit of judgment, uncovers and condemns all that is wrong, and, as the spirit of burning, purges it out. This is a work which is not so pleasant to the believer, but is very vital to the program of God. The Bride of the Lamb must be a glorious church, without spot or wrinkle or any such thing. She must be holy and without blemish. (…)”
Source: Ralph M. Riggs, The Spirit Himself (1949), Chapter 3: The Seven Spirits of God, The Soirit of Holiness, p. 23.