1 Peter 1:21

1:21 Through him you now trust ¹  in God, who raised him from the dead and gave him glory, so that your faith and hope are in God.

1 Peter 5:5

5:5 In the same way, you who are younger, ²  be subject to the elders. And all of you, clothe yourselves with humility toward one another, because God opposes the proud but gives grace to the humble. ³ 

[1:21]  ¹ tc Although there may be only a slight difference in translation, the term translated as “trust” is the adjective πιστούς (pistous). This is neither as common nor as clear as the verb πιστεύω (pisteuw, “believe, trust”). Consequently, most mss have the present participle πιστεύοντας (pisteuonta"; Ì⁷² א C P Ψ 1739 Ï), or the aorist participle πιστεύσαντες (pisteusante"; 33 pc), while A B pc vg have the adjective. Thus, πιστούς is to be preferred. In the NT the adjective is routinely taken passively in the sense of “faithful” (BDAG 820 s.v. πιστός 1). That may be part of the force here as well: “you are now faithful to God,” although the primary force in this context seems to be that of trusting. Nevertheless, it is difficult to separate faith from faithfulness in NT descriptions of Christians’ dependence on God.

[5:5]  ² sn In this context younger and elder are terms that combine two meanings: relative age and an official structure of leadership in the church. As in v. 1, elder here denotes those who exercise spiritual leadership, who for the most part are older in years. Likewise younger means the rest of the community, who for the most part are younger in age, who are urged to accept the authority of their leaders.

[5:5]  ³ sn A quotation from Prov 3:34 (cf. Jas 4:6).