'Take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.'—Eph. vi. 13.

The military metaphor of which this verse is the beginning was obviously deeply imprinted on Paul's mind. It is found in a comparatively incomplete form in his earliest epistle, the first to the Thessalonians, in which the children of the day are exhorted to put on the breastplate of faith and love, and for a helmet the hope of salvation. It reappears, in a slightly varied form, in the Epistle to the Romans, where those whose salvation is nearer than when they believed, are exhorted, because the day is at hand, to cast off, as it were, their night-gear, and to put on the 'armour of light'; and here, in this Epistle of the Captivity, it is most fully developed. The Roman legionary, to whom Paul was chained, here sits all unconsciously for his portrait, every detail of which is pressed by Paul into the service of his vivid imagination; the virtues and graces of the Christian character, which are 'the armour of light,' are suggested to the Apostle by the weapon which the soldier by his side wore. The vulgarest and most murderous implements assume a new character when looked upon with the eyes of a poet and a Christian. Our present text constitutes the general introduction to the great picture which follows, of 'the panoply of God.'

I. We must be ready for times of special assaults from evil.

Most of us feel but little the stern reality underlying the metaphor, that the whole Christian life is warfare, but that in that warfare there are crises, seasons of special danger. The interpretation which makes the 'evil day' co-extensive with the time of life destroys the whole emphasis of the passage: whilst all days are days of warfare, there will be, as in some prolonged siege, periods of comparative quiet; and again, days when all the cannon belch at once, and scaling ladders are reared on every side of the fortress. In a long winter there are days sunny and calm followed, as they were preceded, by days when all the winds are let loose at once. For us, such times of special danger to Christian character may arise from temporal vicissitudes. Joy and prosperity are as sure to occasion them as are sorrows, for to Paul the 'evil day' is that which especially threatens moral and spiritual character, and these may be as much damaged by the bright sunshine of prosperity as by the midwinter of adversity, just as fierce sunshine may be as fatal as killing frost. They may also arise, without any such change in circumstances, from some temptation coming with more than ordinary force, and directed with terrible accuracy to our weakest point.

These evil days are ever wont to come on us suddenly; they are heralded by no storm signals and no falling barometer. We may be like soldiers sitting securely round their camp fire, till all at once bullets begin to fall among them. The tiger's roar is the first signal of its leap from the jungle. Our position in the world, our ignorance of the future, the heaped-up magazines of combustibles within, needing only a spark, all lay us open to unexpected assaults, and the temptation comes stealthily, 'as a thief in the night.' Nothing is so certain as the unexpected. For these reasons, then, because the 'evil day' will certainly come, because it may come at any time, and because it is most likely to come 'when we look not for it,' it is the dictate of plain common sense to be prepared. If the good man of the house had known at what hour the thief would have come, he would have watched; but he would have been a wiser man if he had watched all the more, because he did not know at what hour the thief would come.

II. To withstand these we must be armed against them before they come.

The main point of the exhortation is this previous preparation. It is clear enough that it is no time to fly to our weapons when the enemy is upon us. Aldershot, not the battlefield, is the place for learning strategy. Belshazzar was sitting at his drunken feast while the Persians were marching on Babylon, and in the night he was slain. When great crises arise in a nation's history, some man whose whole life has been preparing him for the hour starts to the front and does the needed work. If a sailor put off learning navigation till the wind was howling and a reef lay ahead, his corpse would be cast on the cruel rocks. It is well not to be 'over-exquisite,' to cast the fashion of 'uncertain evils,' but certain ones cannot be too carefully anticipated, nor too sedulously prepared for.

The manner in which this preparation is to be carried out is distinctly marked here. The armour is to be put on before the conflict begins. Now, without anticipating what will more properly come in considering subsequent details, we may notice that such a previous assumption implies mainly two things—a previous familiarity with God's truth, and a previous exercise of Christian virtues. As to the former, the subsequent context speaks of taking the sword of the Spirit, which is the word of God, and of having the loins girt with truth, which may be objective truth. As to the latter, we need not elaborate the Apostle's main thought that resistance to sudden temptations is most vigorous when a man is accustomed to goodness. One of the prophets treats it as being all but impossible that they who have been accustomed to evil shall learn to do well, and it is at least not less impossible that they who have been accustomed to do well shall learn to do evil. Souls which habitually walk in the clear spaces of the bracing air on the mountains of God will less easily be tempted down to the shut-in valleys where malaria reigns. The positive exercise of Christian graces tends to weaken the force of temptation. A mind occupied with these has no room for it. Higher tastes are developed which makes the poison sweetness of evil unsavoury, and just as the Israelites hungered for the strong, coarse-smelling leeks and garlic of Egypt, and therefore loathed 'this light bread,' so they whose palates have been accustomed to manna will have little taste for leeks and garlic. The mental and spiritual activity involved in the habitual exercise of Christian virtues will go far to make the soul unassailable by evil. A man, busily occupied, as the Apostle would have us to be, may be tempted by the devil, though less frequently the more he is thus occupied; but one who has no such occupations and interests tempts the devil. If our lives are inwardly and secretly honeycombed with evil, only a breath will be needed to throw down the structure. It is possible to become so accustomed to the calm delights of goodness, that it would need a moral miracle to make a man fall into sin.

III. To be armed with this armour, we must get it from God.

Though it consists mainly of habitudes and dispositions of our own minds, none the less have we to receive these from above. It is 'the panoply of God,' therefore we are to be endued with it, not by exercises in our own strength, but by dependence on Him. In old days, before a squire was knighted, he had to keep a vigil in the chapel of the castle, and through the hours of darkness to watch his armour and lift his soul to God, and we shall never put on the armour of light unless in silence we draw near to Him who teaches our hands to war and our fingers to fight. Communion with Christ, and only communion with Christ, receives from Him the life which enables us to repel the diseases of our spirits. What He imparts to those who thus wait upon Him, and to them only, is the Spirit which helps their infirmities and clothes their undefended nakedness with a coat of mail. If we go forth to war with evil, clothed and armed only with what we can provide, we shall surely be worsted in the fray. If we go forth into the world of struggle from the secret place of the Most High, 'no weapon that is formed against us shall prosper,' and we shall be more than conquerors through Him that loved us.