Ephesians 5:7

Be not ye therefore partakers with them, for ye were once darkness, but are now light in the Lord: walk as children of the light (for the fruit of the light is all goodness and righteous and truth).

These verses prove the coherence of the whole paragraph beginning with Ephesians 5:3. Up to this point, Paul was describing the "unfruitful works of darkness" (Ephesians 5:11); and the argument of this passage is, "Do not take up the old ways again; you once practiced all that; you know how useless and unfruitful such works are; and you now belong to a new order of things; "Ye are the light in the Lord." The glorious results (fruit) of the new way of living in Christ are all "goodness, righteousness and truth"!