Therefore, prepare your minds for action,{Literally, "gird up the loins of your mind"} be sober and set your hope fully on the grace that will be brought to you at the revelation of Jesus Christ--
except that Peter doubles the metaphor by ascribing loins to the mind. And he intimates that our minds are held entangled by the passing cares of the world and by vain desires, so that they rise not upward to God. Whosoever, then, really wishes to have this hope, let him learn in the first place to disentangle himself from the world, and gird up his mind that it may not turn aside to vain affections. And for the same purpose he enjoins sobriety, which immediately follows; for he commends not temperance only in eating and drinking, but rather spiritual sobriety, when all our thoughts and affections are so kept as not to be inebriated with the allurements of this world. For since even the least taste of them stealthily draws us away from God, when one plunges himself into these, he must necessarily become sleepy and stupid, and he forgets God and the things of God. 