Christ, as obedient children, not conformable to the previous lusts of your ignorance; but as He who has called you is Holy, be ye also holy in all your conduct, as it is written, Be ye holy for I am Holy.

This is an admonition to faith, and the sense is this: while such things are preached to you and bestowed upon you through the Gospel as the angels would rejoice and be desirous to behold, rely on them, and fix your confidence thereon with all firmness, so that it shall be a real faith, and not a painted or fictitious fancy or dream.

Gird up the loins of your mind. Here Peter speaks of a spiritual girding of the mind, just as one girds his sword to the loins of his body. This girding has Christ also enforced, Luke xii., where he says, "Let your loins be girt about." In some places the Scriptures speak of the loins with reference to bodily lust; but here St. Peter speaks of the loins of the spirit. As to the body, Scripture speaks of the loins with reference to natural generation from the father; as we read, Genesis xlix., that from the loins of Judah Christ should come. Likewise the bodily girding of the loins is the same with chastity, as Isaiah says, chapter xi., "Righteousness shall be the girdle of his loins, and faith the girdle of his reins." That is, only by faith is wicked lust subdued and restrained.

But this spiritual girding, whereof the Apostle speaks, means more. As a virgin is pure and inviolate in body, so is the soul spiritually inviolate through faith, by which it becomes Christ's bride. But if it falls from faith into false doctrine, it must be brought to shame. Hence Scripture uniformly calls impiety and unbelief, adultery and whoredom,—that is, when the soul relies on human doctrines, and thus lets go its hold on faith and Christ. This St. Peter here forbids, when he calls on us to gird up the loins of our mind; as though he would say, ye have now heard the Gospel and have come to believe, therefore see to it that ye abide therein, and do not suffer yourselves to be drawn away with false doctrine, so that ye shall not waver and run hither and thither with works.

And here he adopts a peculiar mode of speech, not after the manner of St. Paul, where he speaks of "the loins of your mind." He calls that mind here which we speak of as disposition; as when I say, "This seems to me right and as Paul speaks, so we understand it, so we are disposed." In this he refers especially to faith, and would say: ye have attained a correct apprehension that we must be justified through faith; abide in that mind; gird it up well, hold fast thereon, and suffer not yourselves to be torn from it; then shall ye stand well. For many false teachers shall come in and set up human doctrines that they may pervert your understanding and loose the girdle of your faith; wherefore be admonished, and bind it well to your mind.

The hypocrites who rest on their own works, and hence pass a carefully abstemious life, are thus minded, that God must bring them to heaven for their works' sake; they are puffed up, become proud, abiding in their own opinion and blindness, like the Pharisees, Luke xviii. Of whom also Mary speaks, in the Magnificat, where she uses the same word that stands here in Peter, He hath scattered the proud in the disposition of their hearts,—that is, in their own minds.

Be sober. To be sober is of service outwardly to the body, and is the chief work of faith. For though a man has been justified, he still is not secured from evil lusts; faith has indeed begun to subdue the flesh, but this is ever bestirring itself, and likewise running riot in all sorts of lusts, which would gladly break forth again and act after their own will. Therefore the spirit must daily work to restrain and subdue it, and must charge itself therewith, without intermission, and have a care of the flesh that it do not destroy faith. Therefore those persons deceive themselves, who indeed say they have faith, and imagining that this is enough, live thenceforth according to their own caprice. Where the faith is genuine it must control the body and hold it in check, so that it shall not do what it lusts after. Therefore St. Peter says that we should be sober.

Yet he would not have us destroy the body or weaken it too much, as we find many do who have fasted and tortured themselves to death. St. Bernard, even, continued for a long time in this folly, although he was truly a holy man, for he mortified his body to such an extent that his breath was offensive and could not be endured. Yet he afterwards forsook it, and charged his brethren that they should not inflict injury upon the body; for he saw very well that he had rendered himself unfit to be of service to his brethren. Therefore St. Peter requires nothing more than that we should be sober,—that is, mortify the body to such an extent as to prevent its being in our apprehension too wanton; for he fixes no definite time how long we should fast, as the Pope has done, but leaves it to each, individually, to fast so that he remain sober and do not burden the body with gluttony, to the end that he remain in possession of reason and reflection, and consider how far it is necessary for him to hold the body in check. For it is utterly idle to impose one and the same command upon a whole congregation and church, since we are so unlike one to the other; one strong, another weak in body,—so that one must mortify it more, another less, provided the body is to remain sound and in the best state for exertion.

But another multitude mistake here, determined that they will not fast, and that they may eat flesh, and herein are wrong. For these persons reject the Gospel also, and are unprofitable as well as the others; doing no more than contemn the Pope's command, unwilling to gird up their mind and spirit, as Peter says, leaving the body to its own caprice, that it may become corrupt and wanton. It is well to fast; but that only can be called true fasting, when we give the body no more food than is needful for it that it may retain its health and endure labor and watchfulness—that the old ass do not become too obstinate, and going on the ice to dance, break a bone; but go on subject to control, and following the spirit; not after the manner of those who, whenever they fast, fill themselves so full of fish and the best wine, that their bellies are puffed out. Thus St. Peter directs us to be sober, and now says further:

And fix your hope firmly (or with all deliberation) on the grace which is offered you. The christian faith is of such a nature that it plants itself freely on the word of God with entire confidence, ventures freely thereupon, and goes joyfully onward. Therefore Peter would say: The loins of your mind are girt about, and your faith is genuine, when you venture it thus on that Word, let it cost what it will,—property, honor, limb, or life.

Thus has he with these words in truth well described a genuine and unfeigned faith. It must not be a corrupt and sleepy faith, becoming thus only a dream, but a living and active reality, that we may with all deliberation devote ourselves to it and cleave to the Word, so that, let God permit it to go with us as it will, we will yet press onward through good and ill. Thus when I come to die I must venture promptly on Christ, lift my head boldly, and rely upon the word of God which cannot deceive me. Thus must faith go straight forward, in nothing permit itself to be led astray, and subject to scrutiny all that it sees, hears and feels. Such faith St. Peter requires as consists, not in thought or word, but in such power as this.

Again, St. Peter says: Set your hope on the grace which is offered you. That is, ye have not deserved this great grace, but yet it is freely offered you; for the Gospel, which reveals this grace, is no invention or discovery of our own, but the Holy Spirit has sent it down from heaven into the world. But what is it that is offered to us? This, that we have already heard, that