God’s will for Christian life is not an unknowable secret in every respect. Paul names holiness and then speaks concretely about sexual conduct and the treatment of others. Grace does not make the body irrelevant to obedience.
The Word
ἁγιασμός (hagiasmos) means sanctification, holiness, or consecration. It is a noun related to the language of being holy. Depending on context, attention may fall on God’s sanctifying action or the holy condition and conduct associated with it.
We should not assume that every occurrence uses the word in exactly the same narrow sense as a later doctrinal outline. Christian theology distinguishes justification and sanctification for good reasons, but the Greek sentence must still be read before assigning its place in that outline.
Range of Meaning
First Corinthians 1:30 identifies Christ as our wisdom, righteousness, sanctification, and redemption. Romans 6:19 and 6:22 connect holiness with the life of people freed from slavery to sin. First Thessalonians 4 addresses holy conduct directly.
These statements do not compete. Christ is the source of the believer’s holiness, and those who belong to him are called to live accordingly. The gift and the resulting life should neither be collapsed into one another nor separated.
Where You’ll Meet It
Paul writes:
“For this is God’s will: that you become holy” (1 Thessalonians 4:3, NET)
The following clauses concern abstaining from sexual immorality and refusing to wrong or exploit another. Holiness is not merely an inward religious quality that leaves ordinary bodily relationships untouched.
The paragraph also speaks of God’s calling and his giving of the Holy Spirit. Paul does not present obedience as an independent project by which people turn themselves into recipients of grace. He addresses those called by God and warns them against rejecting that calling.
What Confessional Lutherans Hear
Augsburg Confession VI teaches that faith should bear the good works God commands while refusing to trust those works as a means of earning grace. That distinction is indispensable here. Actual obedience matters, and it does not become the ground of justification.
The Small Catechism’s Third Article explanation places our being made holy and kept in the faith within the Spirit’s work. He works through the gospel and continues to give forgiveness in the Church. Holiness does not advance by moving beyond our need for Christ’s mercy.
At the same time, forgiveness is not a reason to make peace with deliberate sin. A Christian fights the desires that injure the neighbor and dishonor God’s gifts. The struggle is imperfect, but it is a real struggle rather than a theological excuse for surrender.
Where People Get It Wrong
One error makes progress in holiness the measurement that determines whether Christ’s righteousness is enough. Another makes justification a reason to avoid speaking about obedience at all. Paul gives us neither a ladder to earn acceptance nor permission to disregard the neighbor.
Comparisons with other Christians can distort the issue further. God’s command, not someone else’s apparent failure, identifies the good to which we are called.
So What
Hear the command concretely. Turn from the conduct it exposes, seek forgiveness, and take the practical steps love requires.
Dikaiosynē and Peripateō help keep righteousness received and the resulting walk in their proper relation.