The Apostle Peter
1 Peter 3:2ESV·traditional attribution

when they see your respectful and pure conduct.

John Calvin Reformed @genevareformer

2 While they behold For minds, however alienated from the true faith, are subdued, when they see the good conduct of believers; for as they understood not the doctrine of Christ, they form an estimate of it by our life. It cannot, then, be but that they will commend Christianity, which teaches purity and fear.

Matthew Henry Presbyterian @wholebiblehenry

The apostle having treated of the duties of subjects to their sovereigns, and of servants to their masters, proceeds to explain the duty of husbands and wives. I. Lest the Christian matrons should imagine that their conversion to Christ, and their interest in all Christian privileges, exempted them from subjection to their pagan or Jewish husbands, the apostle here tells them, 1. In what the duty of wives consists.

Commenting on 1 Peter 3:1-7

John Gill Reformed Baptist @doctorgill

While they behold your chaste conversation,.... Cheerful subjection, strong affection, and inviolable attachment to them, and strict regard to the honour of the marriage state, and to the preserving of the bed undefiled with lusts and adulteries: coupled with fear; with reverence of their husbands, giving them due honour, and showing all proper respect; or with the fear of God, which being before their eyes...