This prayer is also remarkable if we notice the spiritual condition of the Thessalonians, for of them we read that they had received the word of God with joy, and had turned from idols to serve the living God, and yet the Apostle prays for their sanctification. By this he does not mean sinlessness, and a careful study of his position would lead us to know that he does not teach that sanctification may be ever apart from growth. We must day by day come more and more into the likeness of Christ. There are three words which it would be well for us to remember in our study of this subject.
First: Position. If we would grow unto his likeness we must be where he can let shine upon us the light of his countenance. Frances Ridley Havergal had an aeolian harp sent to her which she tried to play with her fingers, and failed. At last a friend suggested that she place it in the window, and the music as the wind touched the strings was entrancing. We must be where he can use us.
Second: Purification. Sanctification is necessary because God uses only that which is clean, never an unclean life.
Third: Possession. It is really Christ filling us, and he will fill us if we give him the opportunity. The extent of this work is made plain in Paul's prayer:
(1) The spirit is touched, and the spirit is that part of our nature which is capable of fellowship with God.
(2) The soul is filled, and the soul is the seat of all our intellectual faculties.
(3) The body is possessed, and since the body is just the servant of the higher powers of man, we can easily understand how necessary the work is. It is needful,
(a) For our peace, for the God of peace is to sanctify us.
(b) For our prayers. For Paul is talking about prayer when he praises.
(c) For our praise, for we are told that we must rejoice evermore.