This is in addition to the fact that your treasure itself is safely preserved in heaven. Man himself is also required to keep constant guard and sleepless vigilance over his salvation (Mt 24:42; Mt 25:13 and parallels), and to struggle against its enemies.
Nevertheless, because of human weakness, the almighty power of God is precisely what is needed. It protects him from the many, strong, and cunning enemies of his salvation, and strengthens him in the struggle against them.
This is why the apostle says that believers are kept by the power of God.
As the means of this keeping on man’s part, his faith is indicated. The object of this faith is not designated here. Yet without doubt it is the same object indicated a little later (v. 8), namely the Lord Jesus Christ and the work of mankind’s redemption accomplished by Him.
The almighty power of God keeps the Christian for the inheritance of future good things through his faith in Christ as Redeemer of the world. If a man does not want to have this faith, then the power of God will not keep him.
This faith is both the means by which the inheritance of eternal life is attained and the guard by which the believer is kept for eternal life, or for salvation.
By this word the concepts of inheritance and living hope are more clearly defined (vv. 3-4). This inheritance and the object of living hope is the salvation of believers.
In the general concept of salvation there are two sides: deliverance from destruction and placement in a secure condition. In the concept of salvation in its particular Christian sense, as the salvation of man in Christ, these two sides are defined more precisely.
They are deliverance of fallen man from eternal destruction in separation from God, and his reception into the Kingdom of Christ, or into the Church. Through the Church he is received into eternal blessedness in union with God.
In other words, salvation is deliverance from the power of Satan, sin, and death, and placement in the realm of freedom, righteousness, and truth (Acts 2:40; Acts 4:12; Acts 5:31; Acts 15:11).
Here the latter, positive side of the concept of salvation is taken chiefly. The discourse chiefly concerns the good things, or treasures of the inheritance, kept in heaven.
That is, it speaks of the eternal blessedness of the righteous. This is also indicated by the following expression: “ready to be revealed in the last time.”
The word “revealed” means here, as everywhere, the manifestation of what already is or truly exists, but is still hidden. The word “ready” means the same as destined to be, and moreover in no long time.
This is more closely defined by the following words, “in the last time.” The whole expression means this: the good things of the Kingdom of Heaven, to whose inheritance Christians are called through regeneration, have already been acquired for them by Christ’s redeeming death.
Yet now, for the present life, they are not fully accessible. They are as though hidden and kept in heaven. They will be fully revealed, as the complete blessedness of the righteous, or salvation, in the last time.
By this last time, according to the use of this expression among the New Testament writers, is meant the end of this age (cf. Mt 13:39-40; Mt 24:3; Mt 28:20; 2 Tim 3:1; Jude 18 and parallels).
That is, it means the end of the kingdom of grace and the opening of the kingdom of glory. This will take place at the second coming of Christ for the final judgment of the world.
The apostle does not state directly here when this last time will come. Yet by the expression “ready to be revealed” he gives us to understand that it may come soon, that it is near.
This nearness is understood here, without doubt, in the same sense as among the other apostles. With the first appearing of Christ in the world, the final epoch of the divine economy of human salvation began.
During this epoch one must constantly be ready for the second coming of the Lord Jesus Christ for judgment.