Commentaries:
Jamieson, Fausset, and Brown
therefore—resuming the exhortation which he had begun with, "I therefore beseech you that ye walk worthy," etc. (Ephesians 4:1).
testify in the Lord—in whom (as our element) we do all things pertaining to the ministry (I Thessalonians 4:1 [ALFORD]; Romans 9:1).
henceforth . . . not—Greek, "no longer"; resumed from Ephesians 4:14.
other—Greek, "the rest of the Gentiles."
in the vanity, etc.—as their element: opposed to "in the Lord." "Vanity of mind" is the waste of the rational powers on worthless objects, of which idolatry is one of the more glaring instances. The root of it is departure from the knowledge of the true God (Ephesians 4:18-19; Romans 1:21; I Thessalonians 4:5).
Other Jamieson, Fausset, and Brown entries containing Ephesians 4:17:
Romans 1:18
Romans 8:4
Ephesians 4:9
Ephesians 4:21
Ephesians 4:22
Ephesians 4:23
1 Peter 1:18
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