From the Word
15 Look carefully then how you walk, not as unwise men but as wise, 16 making the most of the time, because the days are evil. 17 Therefore do not be foolish, but understand what the will of the Lord is. 18 And do not get drunk with wine, for that is debauchery; but be filled with the Spirit, 19 addressing one another in psalms and hymns and spiritual songs, singing and making melody to the Lord with all your heart, 20 always and for everything giving thanks in the name of our Lord Jesus Christ to God the Father.
Ephesians 5:15–20, RSV
The time is unquestionably good as long as the gospel is faithfully preached and received. At the same time, even to-day the world is filled with evils, factions, false theories and bad examples of every sort; much of this wickedness is inherent in ourselves. With these things the Christian must always contend; the devil pursues, and our own flesh discourages and allures us from recognition and observance of the divine will. If we strive not against it, we shall soon lose sight of God’s will, to our own injury, even while listening to the gospel. For the devil’s strongest fury is exerted to befoul the world with fanaticism, and to draw from the pure doctrine of faith into that evil even those who possess the gospel. Being flesh and blood we are always self-secure, unwilling to be led by the Spirit, indolent and unresponsive in relation to the Word of God and to prayer. In the outward walks of life, obstacles and evils meet us everywhere, impeding our spiritual progress and impelling us to suppress the gospel and to rend the Church.
Let no one, then, expect to enjoy an era of peace and pleasure here on earth. Although the present time is in itself good, and God bestows upon us the golden year of his Word and his grace, yet the devil is here with his factions and followers, and our own flesh supports him. He corrupts the blessed days of grace at every possible opportunity, and so oppresses Christians that they must contend against him with their utmost strength and vigilance if they would not, through the influence of evils and obstacles, be wrested from the gospel they have received and would persevere therein to the end.
Wherefore we have the best reasons to adapt ourselves to the present time in the best possible way; to walk wisely and circumspectly, showing all faithfulness to the will of God; obeying it while we have opportunity — while still in possession of God’s Word, his grace and his Spirit. Being opposed and obstructed by the devil and our own flesh, we must be wise and careful and guard against following them. So, then, we are to understand by “evil days” the allurements that lead us away from God’s Word and his will.
Luther, Martin, and John Sander. Devotional Readings from Luther’s Works for Every Day of the Year. Augustana Book Concern, 1915, pp. 407–08.