1-е Петра 1:5

kept--Greek, "who are being guarded." He answers the objection, Of what use is it that salvation is "reserved" for us in heaven, as in a calm secure haven, when we are tossed in the world as on a troubled sea in the midst of a thousand wrecks? [CALVIN]. As the inheritance is "kept" (Pe1 1:4) safely for the far distant "heirs," so must they be "guarded" in their persons so as to be sure of reaching it. Neither shall it be wanting to them, nor they to it. "We are guarded in the world as our inheritance is kept in heaven." This defines the "you" of Pe1 1:4. The inheritance, remember, belongs only to those who "endure unto the end," being "guarded" by, or IN "the power of God, through faith." Contrast Luk 8:13. God Himself is our sole guarding power. "It is His power which saves us from our enemies. It is His long-suffering which saves us from ourselves" [BENGEL]. Jde 1:1, "preserved in Christ Jesus"; Phi 1:6; Phi 4:7, "keep"; Greek, "guard," as here. This guarding is effected, on the part of God, by His "power," the efficient cause; on the part of man, "through faith," the effective means. by--Greek, "in." The believer lives spiritually in God, and in virtue of His power, and God lives in him. "In" marks that the cause is inherent in the means, working organically through them with living influence, so that the means, in so far as the cause works organically through them, exist also in the cause. The power of God which guards the believer is no external force working upon him from without with mechanical necessity, but the spiritual power of God in which he lives, and with whose Spirit he is clothed. It comes down on, and then dwells in him, even as he is in it [STEIGER]. Let none flatter himself he is being guarded by the power of God unto salvation, if he be not walking…

The apostle describes the persons to whom he writes, and salutes them (Pe1 1:1, Pe1 1:2), blesses God for their regeneration to a lively hope of eternal salvation (Pe1 1:3-5), in the hope of this salvation he shows they had great cause of rejoicing, though for a little while they were in heaviness and affliction, for the trial of their faith, which would produce joy unspeakable and full of glory (Pe1 1:6-9). This is that salvation which the ancient prophets foretold and the angels desire to look into (Pe1 1:10-12). He exhorts them to sobriety and holiness, which he presses from the consideration of the blood of Jesus, the invaluable price of man's redemption (Pe1 1:13-21), and to brotherly love, from the consideration of their regeneration, and the excellency of their spiritual state (Pe1 1:22-25).

1:5 until you receive this salvation: In the New Testament, salvation often refers to final rescue from sin and death at the time of Christ’s return. This hope encourages believers to persevere to the end (see also 1:9, 10; 2:2; 4:18). • ready to be revealed: The future revealing of God’s salvation contrasts with the present hiddenness of God and his purposes (see also 1:7, 13).