6. Holiness. Sanctification

The word ἁγιασμόη is translated in the A. V. both ‘sanctification' and ‘holiness;' but there is another word, ἁσγιωσύνη, always translated ‘holiness,' and it is well to see the distinction between them.
Both words may be traced to ἅγιος ‘holy,' but ἁγιωσύνη is holiness in its nature and quality. It occurs but three times: "the Spirit of holiness" in Rom. 1:44And declared to be the Son of God with power, according to the spirit of holiness, by the resurrection from the dead: (Romans 1:4); the Christian should be "perfecting holiness in the fear of God," 2 Cor. 7:11Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God. (2 Corinthians 7:1); and Paul prayed for the Thessalonian saints that their hearts might be established "unblameable in holiness before God, even our Father, at the coming of the Lord Jesus Christ with all his saints." 1 Thess. 3:1313To the end he may stablish your hearts unblameable in holiness before God, even our Father, at the coming of our Lord Jesus Christ with all his saints. (1 Thessalonians 3:13).
ἁγιασμός. is more the result and activity of sanctification that produces holiness. It occurs in Rom. 6:19, 2219I speak after the manner of men because of the infirmity of your flesh: for as ye have yielded your members servants to uncleanness and to iniquity unto iniquity; even so now yield your members servants to righteousness unto holiness. (Romans 6:19)
22But now being made free from sin, and become servants to God, ye have your fruit unto holiness, and the end everlasting life. (Romans 6:22); 1 Cor. 1:3030But of him are ye in Christ Jesus, who of God is made unto us wisdom, and righteousness, and sanctification, and redemption: (1 Corinthians 1:30); 1 Thess. 4:3, 4, 73For this is the will of God, even your sanctification, that ye should abstain from fornication: 4That every one of you should know how to possess his vessel in sanctification and honor; (1 Thessalonians 4:3‑4)
7For God hath not called us unto uncleanness, but unto holiness. (1 Thessalonians 4:7); 2 Thess. 2:1313But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth: (2 Thessalonians 2:13); 1 Tim. 2:1515Notwithstanding she shall be saved in childbearing, if they continue in faith and charity and holiness with sobriety. (1 Timothy 2:15); Heb. 12:1414Follow peace with all men, and holiness, without which no man shall see the Lord: (Hebrews 12:14); 1 Pet. 1:22Elect according to the foreknowledge of God the Father, through sanctification of the Spirit, unto obedience and sprinkling of the blood of Jesus Christ: Grace unto you, and peace, be multiplied. (1 Peter 1:2).
ἁγιότης, a kindred word to the above, also signifies ‘holiness' in its essence, perhaps in the most absolute way, ἁγιωσύς having a kind of middle place between ἁγιασμός and It occurs only in Heb. 12:1010For they verily for a few days chastened us after their own pleasure; but he for our profit, that we might be partakers of his holiness. (Hebrews 12:10), unless it should be read in 2 Cor. 1:1212For our rejoicing is this, the testimony of our conscience, that in simplicity and godly sincerity, not with fleshly wisdom, but by the grace of God, we have had our conversation in the world, and more abundantly to you-ward. (2 Corinthians 1:12), ‘holiness' instead of ‘simplicity,' as adopted by several Editors and the R. V. It is His holiness, the holiness of God Himself in its own nature, of which believers are to be partakers ― the end of all His gracious discipline.