1 Peter 1:21

“Who by him do believe in God, etc.] Christ, as God, is the object of faith; as Mediator, he is the way to the Father, by which men come to him, believe in him and lay hold upon him, as their covenant God and Father; and is also the author of that faith by which they believe in him; and all their encouragement to believe is taken from him; and such who do come to God by Christ, and stay themselves upon him, trusting in him, may know, and comfortably conclude, that Christ, who was foreordained from all eternity to be the Redeemer of his people, was manifest in the flesh for their sakes, and to obtain eternal redemption for them, which he was sent to do, by him that raised him up from the dead:…”

“by him--Compare "the faith which is by Him," Act 3:16. Through Christ: His Spirit, obtained for us in His resurrection and ascension, enabling us to believe. This verse excludes all who do not "by Him believe in God," and includes all of every age and clime that do. Literally, "are believers in God." "To believe IN (Greek, 'eis') God" expresses an internal trust: "by believing to love God, going INTO Him, and cleaving to Him, incorporated into His members. By this faith the ungodly is justified, so that thenceforth faith itself begins to work by love" [P. LOMBARD]. To believe ON (Greek, "epi," or dative case) God expresses the confidence, which grounds itself on God, reposing on Him. "Faith…”

“Who by him do believe in God - Faith is sometimes represented particularly as exercised in God, and sometimes in Christ. It is always a characteristic of true religion that a man has faith in God. Compare the notes at Mark 11:22. That raised him up from the dead - See the Acts 2:24; Acts 3:15, Acts 3:26; Acts 4:10; Acts 5:30; Acts 13:30 notes; Romans 4:24; Romans 6:4 notes; 1 Corinthians 15:15 note. And gave him glory - By exalting him at his own right hand in heaven, Phi 2:9; 1 Timothy 3:16; Ephesians 1:20-21. That your faith and hope might be in God - That is, by raising up the Lord Jesus, and exalting him to heaven, he has laid the foundation of confidence in his promises, and of the hope…”

“Who through him believe - For all our faith and hope proceed from the power of his resurrection. In God that raised Jesus, and gave him glory - At his ascension. Without Christ we should only dread God; whereas through him we believe, hope, and love. 1 Peter 1:22”

“by: Joh 5:24, Joh 12:44, Joh 14:6; Heb 6:1, Heb 7:25 that raised: Act 2:24, Act 2:32, Act 3:15, Act 4:10 gave: Pe1 1:11, Pe1 3:22; Mat 28:18; Joh 3:34, Joh 5:22, Joh 5:23, Joh 13:31, Joh 13:32, Joh 17:1; Act 2:33, Act 3:13; Eph 1:20-23; Phi 2:9-11; Heb 2:9 your: Psa 42:5, Psa 146:3-5; Jer 17:7; Joh 14:1; Eph 1:12, Eph 1:13 \*marg. Eph 1:15; Col 1:27; Ti1 1:1 1 Peter 1:22”