Ephesians 6:10

To be "strong in the Lord" is to be strengthened in word and wisdom and the contemplation of truth. All these qualities are encompassed in the titles applying to Christ. The greatest of these is the strength of his might, which is stronger than all human virtues combined. Moral corruption lacks power in his presence. This one virtue, being strong in the Lord, is inconceivably powerful. Those who are wise in these matters call it the strength of his might. It has some analogy with bodily might but far exceeds it. This strength is beautiful, as a strong body is beautiful.

"Finally, dearly beloved, be strong in the Lord, and in the power of His might. Put on the armour of God, that ye may be able to stand against the wiles of the devil; for we wrestle not against flesh and blood, but against principalities and powers, against the rulers of the darkness of this world, against spiritual wickedness in heavenly places (cœlestibus). Wherefore take unto you the armour of God, that ye may be able to withstand in the evil day, and to stand perfect in all (omnibus perfecti). Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness, and your feet shod with the preparation of the Gospel of peace; in all (in omnibus) taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked one. And take the helmet of salvation, and the sword of the Spirit, which is the word of God."2875 It is our wish, brother, that those things which we have written to you should be made known generally to all, in order that things which touch the others should be made known to all. May Almighty God protect you, brother, and all our brethren everywhere situate, even to the end,—even He who has thought good to redeem the whole world, our Lord Jesus Christ, who is blessed for ever. Amen.

"Finally," saith he, "be strong in the Lord." Whenever the discourse is about to conclude, he always employs this turn. Said I not well from the first, that every man's house is a camp in itself? For look, having disposed of the several offices, he proceeds to arm them, and to lead them out to war. If no one usurps the other's office, but every one remains at his post, all will be well ordered. "Be strong," saith he, "in the Lord, and in the strength of His might." That is, in the hope which we have in Him, by means of His aid. For as he had enjoined many duties, which were necessary to be done, fear not, he seems to say, cast your hope upon the Lord, and He will make all easy. But now, when any one is going to the theater, or going off to the bath, he drags all his servants after him; but when he goes to church, not for a moment; nor does he compel them to attend and hear. Now how shall thy servant listen, when thou his master art attending to other things? Hast thou purchased, hast thou bought thy slave? Before all things enjoin him what God would have him do, to be gentle towards his fellow-servants, and to make much account of virtue. Every one's house is a city; and every man is a prince in his own house. That the house of the rich is of this character, is plain enough, where there are both lands, and stewards, and rulers over rulers. But I say that the house of the poor also is a city. Because here too there are offices of authority; for instance, the husband has authority over the wife, the wife over the servants, the servants again over their own wives; again the wives and the husbands over the children. Does he not seem to you to be, as it were, a sort of king, having so many authorities under his own authority? and that it were meet that he should be more skilled both in domestic and general government than all the rest? For he who knows how to manage these in their several relations, will know how to select the fittest men for offices, yes, and will choose excellent ones. And thus the wife will be a second king in the house, lacking only the diadem; and be who knows how to choose this king, will excellently regulate all the rest.