1. Petrus 1:13

Wherefore--Seeing that the prophets ministered unto you in these high Gospel privileges which they did not themselves fully share in, though "searching" into them, and seeing that even angels "desire to look into" them, how earnest you ought to be and watchful in respect to them! gird up . . . loins--referring to Christ's own words, Luk 12:35; an image taken from the way in which the Israelites ate the passover with the loose outer robe girded up about the waist with a girdle, as ready for a journey. Workmen, pilgrims, runners, wrestlers, and warriors (all of whom are types of the Christians), so gird themselves up, both to shorten the garment so as not to impede motion, and to gird up the body itself so as to be braced for action. The believer is to have his mind (mental powers) collected and always ready for Christ's coming. "Gather in the strength of your spirit" [HENSLER]. Sobriety, that is, spiritual self-restraint, lest one be overcome by the allurements of the world and of sense, and patient hopeful waiting for Christ's revelation, are the true ways of "girding up the loins of the mind." to the end--rather, "perfectly," so that there may be nothing deficient in your hope, no casting away of your confidence. Still, there may be an allusion to the "end" mentioned in Pe1 1:9. Hope so perfectly (Greek, "teleios") as to reach unto the end (telos) of your faith and hope, namely, "the grace that is being brought unto you in (so the Greek) the revelation of Christ." As grace shall then be perfected, so you ought to hope perfectly. "Hope" is repeated from Pe1 1:3. The two appearances are but different stages of the ONE great revelation of Christ, comprising the New Testament from the beginning to the end.

Here the apostle begins his exhortations to those whose glorious state he had before described, thereby instructing us that Christianity is a doctrine according to godliness, designed to make us not only wiser, but better. I. He exhorts them to sobriety and holiness. 1. Wherefore gird up the loins of your mind, etc., Pe1 1:13. As if he had said, "Wherefore, since you are so honoured and distinguished, as above, Gird up the loins of your mind. You have a journey to go, a race to run, a warfare to accomplish, and a great work to do; as the traveller, the racer, the warrior, and the labourer, gather in, and gird up, their long and loose garments, that they may be more ready, prompt, and expeditious in their business, so do you by your minds, your inner man, and affections seated there: gird them, gather them in, let them not hang loose and neglected about you; restrain their extravagances, and let the loins or strength and vigour of your minds be exerted in your duty; disengage yourselves from all that would hinder you, and go on resolutely in your obedience. Be sober, be vigilant against all your spiritual dangers and enemies, and be temperate and modest in eating, drinking, apparel, recreation, business, and in the whole of your behaviour. Be sober-mined also in opinion, as well as in practice, and humble in your judgment of yourselves." And hope to the end, for the grace that is to be brought to you at the revelation of Jesus Christ. Some refer this to the last judgment, as if the apostle directed their hope to the final revelation of Jesus Christ; but it seems more natural to take it, as it might be rendered, "Hope perfectly, or thoroughly, for the grace that is brought to you in or by the revelation of Jesus Christ; that is, by the gospel, which brings life and immort…

1:13-21 New birth and the hope of salvation require that Christians live as God’s people, separating themselves from the values of the world and emulating the holiness of God, who redeemed them. 1:13 prepare your minds for action (literally gird the loins of your mind): In Peter’s day, a man had to tuck the hem of his long robe into his belt before he could work or run.