16. The injunction
Be joyful always is at first sight a little surprising coming from one who had had to suffer as much and as continually as Paul. But he learned that affliction and deep joy may go together (2 Cor. 6:10; 12:10), and he rejoiced in tribulations (Rom. 5:3; Col. 1:24; cf. Acts 5:41; 16:25). So he counsels perpetual rejoicing to a suffering church (cf. 1:6). The note of joy is often struck in his other letter to a Macedonian church, that to the Philippians (cf. Phil. 4:4). Indeed, few things about the New Testament church are more remarkable than this continual stress on joy. From an outward point of view there was little to make believers rejoice. But they were ‘in Christ’; they had learned the truth of his words, ‘no-one will take away your joy’ (John 16:22). Now joy is part of the fruit of the Spirit (Gal. 5:22; cf. Rom. 14:17); it is not something Christians work up out of their own resources. The various derivatives of joy occur with startling frequency throughout the New Testament. The word for ‘grace’, for example, is from this root, as are one of the words for ‘to forgive’, one for ‘to give thanks’, and another for ‘gifts of the Spirit’. New Testament Christianity is permeated with the spirit of holy joy.
17. ‘It is not in the moving of the lips, but in the elevation of the heart to God, that the essence of prayer consists’ (Lightfoot), and it is this that enables us to put into practice the injunction
pray continually (cf. Luke 18:1; Rom. 12:12; Eph. 6:18). It is not possible for us to spend all our time with the words of prayer on our lips, but it is possible for us to be all our days in the spirit of prayer, realizing our dependence on God for all we have and are, being conscious of his presence with us wherever we may be, and yielding ourselves continually to him to do his will. Such an inward state will of course find expression from time to time in verbal prayer (notice the frequent ejaculatory prayers throughout Paul’s letters; prayer was so natural to Paul that it inevitably found its way into his correspondence).
18. Paul had learned that ‘in all things God works for the good of those who love him’ (Rom. 8:28). Even in our difficulties and trials God is teaching valuable lessons (Rom. 5:3–5), and they are to be welcomed and used accordingly. This conviction of the divine sovereignty and providence leads to the command,
give thanks in all circumstances. It may not be easy to see the bright side of a particular trial, but if God is over all, then his hand is in that trial; his own cannot but recognize his goodness and make their thanksgiving. Perhaps we should notice that
in all circumstances is not quite the same as ‘at every time’ (the two are differentiated in 2 Cor. 9:8).
For this is God’s will almost certainly refers to all three injunctions, even though
this is singular. They form a unity and belong together.
Will has no article; as in 4:3 it is not the totality of the divine will that is in mind. God would have us do other things, but this triad is certainly part of his will for us. The addition
in Christ Jesus is characteristically Pauline. God’s will is made known in Christ, and it is in Christ that we are given the dynamic that enables us to carry out that divine will.
Leon Morris,
1 and 2 Thessalonians: An Introduction and Commentary, vol. 13, Tyndale New Testament Commentaries (Downers Grove, IL: InterVarsity Press, 1984), 103–105.