13. take . . . of God--not "make," God has done that: you have only to "take up" and put it on. The Ephesians were familiar with the idea of the gods giving armor to mythical heroes: thus Paul's allusion would be appropriate.
      the evil day--the day of Satan's special assaults (Eph 6:12, 16) in life and at the dying hour (compare Re 3:10). We must have our armor always on, to be ready against the evil day which may come at any moment, the war being perpetual (Ps 41:1, Margin).
      done all--rather, "accomplished all things," namely, necessary to the fight, and becoming a good soldier.

JFB.