SCRIPTURE: I Thessalonians 4:3


The doctrine of sanctification is one of the most misunderstood teachings recorded in the New Testament. This is due, in large part, to the fact that it deals with consecration and holiness.

If regeneration has to do with our nature, justification with our standing, and adoption with our position, then sanctification has to do with our character and conduct. In justification we are declared righteous in order that through sanctification we may become righteous. Justification is what God does for us; sanctification, what God does in us. Justification puts us into a right relationship with God; sanctification exhibits the fruit of that relationship - that is, a life separated from a sinful world and dedicated unto God.

Sanctification is a biblical doctrine. The word is found in its various forms at least four hundred times in the Old ’Testament, to say nothing of the many references to it in the New Testament.


The words "sanctify," "saint," "hallow," and "holy’ all come from the same Greek root hagizo or hagiazo (ha-geed-zo). In the New Testament sense, the word means "to place in a relation to God answering to His holiness."

In the Old ’Testament, the root word is kadash (ka-dash) which means "to cut or separate." In either case, sanctification has to do with separation, and this separation is subsequent to, or because of, something else. The sanctified person or thing has been chosen first and then separated. Therefore, sanctification, or being set apart, is subsequent to regeneration.

Two thoughts are prominent in a definition of sanctification:
separation from evil, and dedication unto God.

Separation From Evil

It is evident from scriptures that sanctification necessitates a turning away from all that is sinful and defiling to both soul and body. Note:

Sanctify now yourselves, and sanctify the house of the lord God . . . and carry forth the filthiness out of the holy place. . . And the priests went into the inner part of the house of the lord, to cleanse it and brought out all the uncleanness… Then they went in to Hezekiah the king, and said, We have cleansed all the house of the lord (2 Chronicles 29:5, 16-18).

For this is the will of God, even your sanctification, that ye should abstain from fornication (1 Thessalonians 4:3).

Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world (Titus 2:12).

But as he who hath called you is holy, so be ye holy in all manner of conversation (1 Peter 1:15).

Having 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).

The life of separation, wrought by the experience of sanctification, challenges the believer to forsake the patterns of the world and to follow the pattern of holiness
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