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 3:6

3:6 like Sarah who obeyed ²  Abraham, calling him lord. You become her children ³  when you do what is good and have no fear in doing so. ⁴ 

[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.

[3:6]  ² tn Grk “as Sarah obeyed.”

[3:6]  ³ tn Grk “whose children you become.”

[3:6]  ⁴ tn Grk “doing good and not fearing any intimidation.”