1 Peter 1:4

To an inheritance--the object of our "hope" (Pe1 1:3), which is therefore not a dead, but a "living" hope. The inheritance is the believer's already by title, being actually assigned to him; the entrance on its possession is future, and hoped for as a certainty. Being "begotten again" as a "son," he is an "heir," as earthly fathers beget children who shall inherit their goods. The inheritance is "salvation" (Pe1 1:5, Pe1 1:9); "the grace to be brought at the revelation of Christ" (Pe1 1:13); "a crown of glory that fadeth not away." incorruptible--not having within the germs of death. Negations of the imperfections which meet us on every side here are the chief means of conveying to our minds a conception of the heavenly things which "have not entered into the heart of man," and which we have not faculties now capable of fully knowing. Peter, sanguine, impulsive, and highly susceptible of outward impressions, was the more likely to feel painfully the deep-seated corruption which, lurking under the outward splendor of the loveliest of earthly things, dooms them soon to rottenness and decay. undefiled--not stained as earthly goods by sin, either in the acquiring, or in the using of them; unsusceptible of any stain. "The rich man is either a dishonest man himself, or the heir of a dishonest man" [JEROME]. Even Israel's inheritance was defiled by the people's sins. Defilement intrudes even on our holy things now, whereas God's service ought to be undefiled.

— Jamieson-Fausset-Brown Commentary (public domain)