Things demanded by the correctness of the Christian walk:
v. 15. See, then, that ye walk circumspectly, not as fools, but as wise,
v. 16. redeeming the time, because the days are evil.
v. 17. Wherefore, be ye not unwise, but understanding what the will of the Lord is.
v. 18. And be not drunk with wine, wherein is excess; but be filled with the Spirit,
v. 19. speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your he art to the Lord;
v. 20. giving thanks always for all things unto God and the Father in the name of our Lord Jesus Christ;
v. 21. submitting yourselves one to another in the fear of God.
The apostle continues his admonition to the Christians to walk as the children of light, since such behavior on their part will always serve to impress the unbelievers: Take heed, then, carefully how you walk, not as unwise men, but as wise. Christians should exercise all diligence, watch over their entire life with great diligence. Every step of their way through life must be taken with deliberate carefulness, lest in, showing themselves wise in the sense of Scriptures, in using the proper means for right ends, they forget the caution demanded by the situation and thus become unwise. For this reason they should also make proper use of their time, literally, take advantage of every opportunity, because the days are evil. It may sometimes cost the believers something in self-denial to speak to unbelievers of God and Christ, to rebuke their evil ways, and to show them the one way of salvation, especially since the days are-evil, and therefore do not seem appropriate for such works of love. The general opposition of the world against the Gospel of Christ is a hindering factor. Opportune moments are rare and should he grasped immediately. For this cause also the Christians should not become foolish, devoid of understanding. They are wise in the knowledge of the will of God and should therefore shun everything that tends to take away the understanding which they possess. Discerning they should be; they should learn to distinguish very carefully, mark with Christian jealousy, just what at this time, in this place, under the present conditions, is the will of the Lord. This is true in general, in the entire life of the Christians, as well as in particular, in the conduct of the Christians toward their environment. Note: It is this admonition which should be heeded with far greater diligence in our day, when people that claim to be believers are accommodating themselves to the ways of the world instead of observing the boundary line with the strictness demanded by the Lord. The will of the Lord must decide in any situation, not questions of expediency.
In order that Christians may retain the sane composure necessary for their calling in this world, the following is necessary, of course: And be not inebriated with wine, wherein is excess, but be filled with the Spirit. People that are addicted to wine, that are given to an excess of strong drink, cannot make use of sane judgment; for intemperance results in dissoluteness, in an abandoned, debauched life, in a condition where the calm use of the enlightened reason is out of the question. Believers will rather at all times strive to be filled with the Spirit of God, in whose power they are able to walk in the light, to avoid the works of darkness, to inquire in all things for the will of God. The inspiration and enlightenment of the Spirit should govern the entire life of the Christian.
As an excellent aid toward attaining to this state and remaining in it, Paul mentions: Speaking one to another in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord. In the Old Testament Psalms, as they were used in the services of the Christians from earliest times, in the hymns or chorals which were intended for use in public services, in spiritual songs of a more general tone and nature, but quite distinct from the worldly lyrics and odes, the Christians should edify one another. Would that this admonition were heeded more by the Christians of our days, in order that the great mass of incredibly vapid and unspeakably silly ragtime and jazz pieces would disappear and remain absent from all Christian homes! For true disciples of Jesus should edify and teach one another also by means of the songs which they sing, not only in public worship, but also in their homes. Both in public hymns of praise and thanksgiving and in the jubilant exulting of the believing heart which continues without interruption, all glory should be given to the Lord for His boundless mercy and goodness. By such singing, praying, confessing, heart and mind are lifted up as on mighty wings of joy, and the spiritual life is refreshed and steadied. For surely there is reason enough: Giving thanks always for all things, in the name of our Lord Jesus Christ, to God and the Father. The constant mercy and goodness of God makes thanksgiving a constant duty. There is never a time when a Christian has no occasion to give thanks to God, his heavenly Father, in Jesus Christ, his Lord, with heart and hand and voice, for His fatherly care, also on the days that seem dark. And where this thanksgiving arises from the believing heart, there is joy in the Spirit, joy in the Lord, power for every good work. This relation to God will, in turn, determine the relation of the Christians toward one another: Subjecting yourselves one to another in the fear of Christ. The love toward God and Christ which rules in the hearts of believers naturally finds its expression in a life of service toward their neighbor. The interests of the other are considered on the same level as one's own, one believer endeavoring to prefer the other in honor, and all out of reverence for Christ, who did not come to be ministered unto, but to minister. See Rom_12:10; Gal_5:13.