John Calvin's Commentary on the Bible - 1 Peter 1:6
Verse 6 6Wherein ye greatly rejoice, or, In which ye exult. Though the termination of the Greek verb is doubtful, yet the meaning requires that we read, “ye exult,” rather than “exult ye.” In which refers to the whole that is said of the hope of salvation laid up in heaven. But he rather exhorts than praises them; for his object was to shew what fruit was to come from the hope of salvation, even spiritual joy, by which not only the bitterness of all evil might be mitigated, but also all sorrow... read more
Adam Clarke's Commentary on the Bible - 1 Peter 1:9
Receiving the end of your faith - Ye are put in possession of the salvation of your souls, which was the thing presented to your faith, when ye were called by the Gospel of Christ. Your faith has had a proper issue, and has been crowned with a proper recompense. The word τελος , end, is often used so as to imply the issue or reward of any labor or action. Salvation of your souls - The object of the Jewish expectations in their Messiah was the salvation or deliverance of their bodies... read more