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14. Stand therefore. Now follows a description of the arms which they were enjoined to wear. We must not, however, inquire very minutely into the meaning of each word; for an allusion to military customs is all that was intended. Nothing can be more idle than the extraordinary pains which some have taken to discover the reason why righteousness is made a breastplate, instead of a girdle. Paul’s design was to touch briefly on the most important points required in a Christian, and to adapt them to the comparison which he had already used.

Truth, which means sincerity of mind, is compared to a girdle. Now, a girdle was, in ancient times, one of the most important parts of military armor. Our attention is thus directed to the fountain of sincerity; for the purity of the gospel ought to remove from our minds all guile, and from our hearts all hypocrisy. Secondly, he recommends righteousness, and desires that it should be a breastplate for protecting the breast. Some imagine that this refers to a freely bestowed righteousness, or the imputation of righteousness, by which pardon of sin is obtained. But such matters ought not, I think, to have been mentioned on the present occasion; for the subject now under discussion is a blameless life. He enjoins us to be adorned, first, with integrity, and next with a devout and holy life.

15. And your feet shod. The allusion, if I mistake not, is to the military greaves; for they were always reckoned a part of the armor, and were even used for domestic purposes. As soldiers covered their legs and feet to protect them against cold and other injuries, so we must be shod with the gospel, if we would pass unhurt through the world. It is the gospel of peace, and it is so called, as every reader must perceive, from its effects; for it is the message of our reconciliation to God, and nothing else gives peace to the conscience. But what is the meaning of the word preparation? Some explain it as an injunction to be prepared for the gospel; but it is the effect of the gospel which I consider to be likewise expressed by this term. We are enjoined to lay aside every hinderance, and to be prepared both for journey and for war. By nature we dislike exertion, and want agility. A rough road and many other obstacles retard our progress, and we are discouraged by the smallest annoyance. On these accounts, Paul holds out the gospel as the fittest means for undertaking and performing the expedition. Erasmus proposes a circumlocution, (ut sitis parati,) that ye may be prepared; but this does not appear to convey the true meaning.

16. Taking the shield of faith. Though faith and the word of God are one, yet Paul assigns to them two distinct offices. I call them one, because the word is the object of faith, and cannot be applied to our use but by faith; as faith again is nothing, and can do nothing, without the word. But Paul, neglecting so subtle a distinction, allowed himself to expatiate at large on the military armor. In the first Epistle to the Thessalonians he gives both to faith and to love the name of a breastplate, — “putting on the breastplate of faith and love,” (1 Thessalonians 5:8.) All that was intended, therefore, was obviously this, — “He who possesses the excellencies of character which are here described is protected on every hand.”

And yet it is not without reason that the most necessary instruments of warfare — a sword and a shield — are compared to faith, and to the word of God. In the spiritual combat, these two hold the highest rank. By faith we repel all the attacks of the devil, and by the word of God the enemy himself is slain. If the word of God shall have its efficacy upon us through faith, we shall be more than sufficiently armed both for opposing the enemy and for putting him to flight. And what shall we say of those who take from a Christian people the word of God? Do they not rob them of the necessary armor, and leave them to perish without a struggle? There is no man of any rank who is not bound to be a soldier of Christ. But if we enter the field unarmed, if we want our sword, how shall we sustain that character?

Wherewith ye shall be able to quench all the darts. But quench appears not to be the proper word. Why did he not use, instead of it, ward off or shake off, or some such word? Quench is far more expressive; for it is adapted to the epithet applied to darts The darts of Satan are not only sharp and penetrating, but — what makes them more destructive — they are fiery Faith will be found capable, not only of blunting their edge, but of quenching their heat.

“This,” says John, “is the victory that overcometh the world, even our faith.” (1 John 5:4.)

17. And take the helmet of salvation. In a passage already quoted, (1 Thessalonians 5:8,) “the hope of salvation” is said to be a helmet, which I consider to be in the same sense as this passage. The head is protected by the best helmet, when, elevated by hope, we look up towards heaven to that salvation which is promised. It is only therefore by becoming the object of hope that salvation is a helmet.