Wherefore take unto you. Though our enemy is so powerful, Paul does not infer that we must throw away our spears, but that we must prepare our minds for the battle. A promise of victory is, indeed, involved in the exhortation, that ye may be able. If we only put on the whole armor of God, and fight valiantly to the end, we shall certainly stand. On any other supposition, we would be discouraged by the number and variety of the contests; and therefore he adds, in the evil day. By this expression he rouses them from security, bids them prepare themselves for hard, painful, and dangerous conflicts, and, at the same time, animates them with the hope of victory; for amidst the greatest dangers they will be safe. And having done all. They are thus directed to cherish confidence through the whole course of life. There will be no danger which may not be successfully met by the power of God; nor will any who, with this assistance, fight against Satan, fail in the day of battle.

In the evil day - The day of temptation; the day when you are violently assaulted.
And having done all, to stand - Margin, "or overcome." The Greek word means, to work out, effect, or produce; and then to work up, to make an end of, to vanquish. Robinson, Lexicon. The idea seems to be, that they were to overcome or vanquish all their foes, and thus to stand firm. The whole language here is taken from war; and the idea is, that every foe was to be subdued - no matter how numerous or formidable they might be. Safety and triumph could be looked for only when every enemy was slain.

Wherefore - Because ye have such enemies to contend with, take unto you - assume, as provided and prepared for you, the whole armor of God; which armor if you put on and use, you shall be both invulnerable and immortal. The ancient heroes are fabled to have had armor sent to them by the gods; and even the great armor-maker, Vulcan, was reputed to be a god himself. This was fable: What Paul speaks of is reality. See before on Ephesians 6:11 (note).
That ye may be able to withstand - That ye may not only stand fast in the liberty wherewith Christ hath made you free, but also discomfit all your spiritual foes; and continuing in your ranks, maintain your ground against them, never putting off your armor, but standing always ready prepared to repel any new attack.
And having done all, to stand - Και ἁπαντα κατεργασαμενοι στηναι· rather, And having conquered all, stand: this is a military phrase, and is repeatedly used in this sense by the best Greek writers. So Dionys. Hal. Ant., lib. vi., page 400: Και παντα πολεμια εν ολιγῳ κατεργασαμενοι χρονῳ· "Having in a short time discomfited all our enemies, we returned with numerous captives and much spoil." See many examples in Kypke. By evil day we may understand any time of trouble, affliction, and sore temptation.
As there is here allusion to some of the most important parts of the Grecian armor, I shall give a short account of the whole. It consisted properly of two sorts:
1. Defensive armor, or that which protected themselves.
2. Offensive armor, or that by which they injured their enemies. The apostle refers to both.
I. Defensive Armor
Περικεφαλαια, the Helmet; this was the armor for the head, and was of various forms, and embossed with a great variety of figures. Connected with the helmet was the crest or ridge on the top of the helmet, adorned with several emblematic figures; some for ornament, some to strike terror. For crests on ancient helmets we often see the winged lion, the griffin, chimera, etc. St. Paul seems to refer to one which had an emblematical representation of hope.
Ζωμα, the Girdle; this went about the loins, and served to brace the armor tight to the body, and to support daggers, short swords, and such like weapons, which were frequently stuck in it. This kind of girdle is in general use among the Asiatic nations to the present day.
Θωραξ, the Breast-Plate; this consisted of two parts, called πτερυγες or wings: one covered the whole region of the thorax or breast, in which the principal viscera of life are contained; and the other covered the back, as far down as the front part extended.
Κνημιδες, Greaves or brazen boots, which covered the shin or front of the leg; a kind of solea was often used, which covered the sole, and laced about the instep, and prevented the foot from being wounded by rugged ways, thorns, stones, etc.
Χειριδες, Gauntlets; a kind of gloves that served to defend the hands, and the arm up to the elbow.
Ασπις, the clypeus or Shield; it was perfectly round, and sometimes made of wood, covered with bullocks' hides; but often made of metal. The aspis or shield of Achilles, made by Vulcan, was composed of five plates, two of brass, two of tin, and one of gold; so Homer, Il. U. v. 270: -
- επει πεντε πτυχας ηλασε Κυλλοποδιων,
Τας δυο χαλκειας, δυο δ' ενδοθι κασσιτεροιο,
Την δε μιαν χρυσην.
Five plates of various metal, various mold,
Composed the shield; of brass each outward fold,
Of tin each inward, and the middle gold.
Of shields there were several sorts:
Γερῥων or γερρα, the gerron; a small square shield, used first by the Persians.
Λαισηΐον, Laiseion; a sort of oblong shield, covered with rough hides, or skins with the hair on.
Πελτη, the Pelta; a small light shield, nearly in the form of a demicrescent, with a small ornament, similar to the recurved leaves of a flower de luce, on the center of a diagonal edge or straight line; this was the Amazonian shield.
Θυρεος, the scutum or Oblong Shield; this was always made of wood, and covered with hides. It was exactly in the shape of the laiseion, but differed in size, being much larger, and being covered with hides from which the hair had been taken off. It was called θυρεος from θυρα, a door, which it resembled in its oblong shape; but it was made curved, so as to embrace the whole forepart of the body. The aspis and the thureos were the shields principally in use; the former for light, the latter for heavy armed troops.
II. Offensive Armor, or Weapons;the Following Were Chief:
Εγχος, enchos, the Spear; which was generally a head of brass or iron, with a long shaft of ash.
Δορυ, the Lance; differing perhaps little from the former, but in its size and lightness; being a missile used, both by infantry and cavalry, for the purpose of annoying the enemy at a distance.
Ξιφος, the Sword; these were of various sizes, and in the beginning all of brass. The swords of Homer's heroes are all of this metal.
Μαχαιρα, called also a sword, sometimes a knife; it was a short sword, used more frequently by gladiators, or in single combat. What other difference it had from the xiphos I cannot tell.
Αξινη, from which our word Axe; the common battle-axe.
Πελεκυς, the Bipen; a sort of battle-axe, with double face, one opposite to the other.
Κορυνη, an iron club or mace, much used both among the ancient Greeks and Persians.
Τοξον, the Bow; with its pharetra or quiver, and its stock or sheaf of arrows.
Σφενδονη, the Sling; an instrument in the use of which most ancient nations were very expert, particularly the Hebrews and ancient Greeks.
The arms and armor mentioned above were not always in use; they were found out and improved by degrees. The account given by Lucretius of the arms of the first inhabitants of the earth is doubtless as correct as it is natural.
Arma antiqua manus, ungues, dentesque fuere,
Et lapides, et item silvarum fragmina rami,
Et flammae, atque ignes postquam sunt cognita primum:
Posterius ferri vis est, aerisque reperta:
Sed prius aeris erat quam ferri cognitus usus:
Quo facilis magis est natura, et copia major.
De Rerum Nat., lib. v. ver. 1282.
Whilst cruelty was not improved by art,
And rage not furnished yet with sword or dart;
With fists, or boughs, or stones, the warriors fought;
These were the only weapons Nature taught:
But when flames burnt the trees and scorched the ground,
Then brass appeared, and iron fit to wound.
Brass first was used, because the softer ore,
And earth's cold veins contained a greater store.
Creech.
I have only to observe farther on this head,
1. That the ancient Greeks and Romans went constantly armed;
2. That before they engaged they always ate together; and
3. That they commenced every attack with prayer to the gods for success.

(14) Wherefore take unto you the whole armour of God, that ye may be able to withstand in the (i) evil day, and having done all, to stand.
(14) He shows that these enemies are put to flight only with the armour of God, that is, with uprightness of conscience, a godly and holy life, knowledge of the Gospel, faith, and to be short, with the word of God. And that daily earnest prayer must be made for the health of the Church, and especially for the steadfast faithfulness of the true, godly, and valiant ministers of the word.
(i) See (Ephesians 5:16).

Wherefore take unto you the whole armour of God,.... This is a repetition of the exhortation in Ephesians 6:11; which repetition seems necessary by reason of the many powerful enemies mentioned in the preceding verse, and serves to explain what is meant by putting it on: and leads on the apostle to give an account of the several parts of this armour: the end of taking it is much the same as before,
that ye may be able to withstand in the evil day; that is, that ye may be able to stand against the wiles and stratagems of Satan, against his power and might, to oppose his schemes, and resist his temptations: and so the Syriac version renders it, "that ye may be able to meet the evil one"; to face him, and give him battle, being accoutred with the whole armour of God; though the Greek copies, and other versions, read, "in the evil day"; in which sin and iniquity abound, error and heresy prevail, Satan is very busy, trials and afflictions come on, persecution arises because of the word, and God's judgments are in the earth:
and having done all to stand; or having overcome, having routed the enemy, stand as conquerors; or rather, having took and put on the whole armour of God, in order to stand, and withstand the enemy.

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 (Ephesians 6:12, Ephesians 6:16) in life and at the dying hour (compare Revelation 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 (Psalm 41:1, Margin).
done all--rather, "accomplished all things," namely, necessary to the fight, and becoming a good soldier.

In the evil day - The war is perpetual; but the fight is one day less, another more, violent. The evil day is either at the approach of death, or in life; may be longer or shorter and admits of numberless varieties. And having done all, to stand - That ye may still keep on your armour, still stand upon your guard, still watch and pray; and thus ye will be enabled to endure unto the end, and stand with joy before the face of the Son of Man.