Who are kept by the power of God through faith unto salvation ready to be revealed in the last time. Who are kept - Φρουρουμενους· Who are defended as in a fortress or castle. There is a remarkable correspondence between the two verbs used in this sentence: the verb τηρεω, signifies to keep, watch, guard; and τηρησις, is a place of custody or prison. And φρουρεω, from φρουρος, a sentinel, signifies to keep as under a military guard. See on Galatians 3:22, Galatians 3:23. The true disciples of Christ are under the continual watchful care of God, and the inheritance is guarded for them. In some countries military posts are constantly kept on the confines, in order to prevent irruptions from a neighboring people; and, in many cases, heirs, while in their minority, are kept in fortified places under military guards.
By the power of God - Εν δυναμει Θεου· By the mighty and miracle-working power of God; for nothing less is necessary to keep and preserve, in this state of continual trial, a soul from the contagion that is in the world. But this power of God is interested in the behalf of the soul by faith; to believe is our work, the exertion of the almighty power is of God. No persevering without the power, and no power without faith.
Ready to be revealed - Or rather, Prepared to be revealed. The inheritance is prepared for you; but its glories will not be revealed till the last time - till ye have done with life, and passed through your probation, having held fast faith and a good conscience. Some by salvation understand the deliverance of the Christians from the sackage of Jerusalem, the end of the Jewish polity being called the last time; others suppose it to refer to the day of judgment, and the glorification of the body and soul in heaven.