that each one of you know how to possess himself of his own vessel in sanctification and honor,
Temperance or self control is one of the Christian graces (2 Peter 1:5-7). Some activities that are acceptable when practiced in moderation and within prescribed boundaries become sinful when carried to excess. On the other hand, some activities are totally prohibited, in which case abstinence and avoidance are the only responsible choices. Such is the case with fornication. Sanctification and fornication are antithetical, and it is no more possible to be sanctified and honorable and a fornicator than to mix oil with water.