5:23 And may the God of peace sanctify you - By the peace he works in you, which is a great means of sanctification. Wholly - The word signifies wholly and perfectly; every part and all that concerns you; all that is of or about you. And may the whole of you, the spirit and the soul and the body - Just before he said you; now he denominates them from their spiritual state. The spirit - Gal 6:8; wishing that it may be preserved whole and entire: then from their natural state, the soul and the body; (for these two make up the whole nature of man, Matt 10:28;) wishing it may be preserved blameless till the coming of Christ. To explain this a little further: of the three here mentioned, only the two last are the natural constituent parts of man. The first is adventitious, and the supernatural gift of God, to be found in Christians only. That man cannot possibly consist of three parts, appears hence: The soul is either matter or not matter: there is no medium. But if it is matter, it is part of the body: if not matter, it coincides with the Spirit.

1 Thessalonians 5:23 Parallel Commentaries

Third Sunday after Epiphany
Text: Romans 12, 16-21. 16 Be not wise in your own conceits. 17 Render to no man evil for evil. Take thought for things honorable in the sight of all men. 18 If it be possible, as much as in you lieth, be at peace with all men. 19 Avenge not yourselves, beloved, but give place unto the wrath of God: for it is written, Vengeance belongeth unto me; I will recompense, saith the Lord. 20 But if thine enemy hunger, feed him; if he thirst, give him to drink: for in so doing thou shalt heap coals of fire …
Martin Luther—Epistle Sermons, Vol. II

The Alarum
That is not, however, the topic upon which I now desire to speak to you. I come at this time, not so much to plead for the early as for the awakening. The hour we may speak of at another time--the fact is our subject now. It is bad to awake late, but what shall be said of those who never awake at all? Better late than never: but with many it is to be feared it will be never. I would take down the trumpet and give a blast, or ring the alarm-bell till all the faculties of the sluggard's manhood are …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 17: 1871

Peace
Grace unto you and peace be multiplied. I Pet 1:1. Having spoken of the first fruit of sanctification, assurance, I proceed to the second, viz., Peace, Peace be multiplied:' What are the several species or kinds of Peace? Peace, in Scripture, is compared to a river which parts itself into two silver streams. Isa 66:12. I. There is an external peace, and that is, (1.) (Economical, or peace in a family. (2.) Political, or peace in the state. Peace is the nurse of plenty. He maketh peace in thy borders, …
Thomas Watson—A Body of Divinity