I Peter 1:8

not having seen, ye love--though in other cases it is knowledge of the person that produces love to him. They are more "blessed that have not seen and yet have believed," than they who believed because they have seen. On Peter's own love to Jesus, compare Joh 21:15-17. Though the apostles had seen Him, they now ceased to know Him merely after the flesh. in whom--connected with "believing": the result of which is "ye rejoice" (Greek, "exult"). now--in the present state, as contrasted with the future state when believers "shall see His face." unspeakable-- (Co1 2:9). full of glory--Greek, "glorified." A joy now already encompassed with glory. The "glory" is partly in present possession, through the presence of Christ, "the Lord of glory," in the soul; partly in assured anticipation. "The Christian's joy is bound up with love to Jesus: its ground is faith; it is not therefore either self-seeking or self-sufficient" [STEIGER].

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).