1 Thessalonians 4:3

For this is the will of God, even your sanctification, that ye abstain from fornication;

Even your sanctification ... Paul was about to cite three things which entered into sanctification: (a) abstaining from fornication; (b) possessing one's vessel in a state of honor; and (c) refraining from defrauding a brother in this matter. Behold then the true definition of sanctification, which may be summed up in a word, moral living. Sanctification is not therefore some kind of special or second blessing, but an achieved status of upright character. One is truly sanctified when he is converted, believing, repenting and being baptized into Christ; but, as Kelcy maintained, "The state of sanctification is one which the Christian must be careful to maintain."[6]