Therefore, preparing your minds for action, and being sober- minded, set your hope fully on the grace that will be brought to you at the revelation of Jesus Christ. – 1 Peter 1:13
1. Wherefore gird up the loins of your mind, etc., v. 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.
Matthew Henry’s Commentary on the Whole Bible (Spokane, WA; Olive Tree Bible Software) Commentary on 1 Peter 1:13