ISB ~ 1 Peter 3 v1

Likewise:Begins a third application of the submission principle introduced in 2:13 and continued in 2:18. wives, be submissive: Christian wives are counseled to obey their husbands, some of whom were non-Christians. Peter envisions this as a dignified submission that earns a husband’s respect rather than a degrading servitude that quietly endures personal abuse or insults to the faith. The social order of the day, where husbands ruled over their wives as the supreme authorities of the household, is not directly challenged or criticized. Instead, existing norms are infused with gospel charity: in this case, Peter urges Christian brides to exercise heroic love and service within the context of marriage. Paul gives similar counsel to married women (Eph 5:22-24; Col 3:18), though he addresses situations in which husband and wife are both believers (an important exception is 1 Cor 7:12-16). See note on Eph 5:22.

without a word:The witness of a loving and supportive wife can win unbelieving husbands over to the faith. For the example of St. Monica and the eventual conversion of her husband, see St. Augustine, Confessions 9, 19-22.