1 Peter 3:15

but sanctify the Lord God in your hearts The better MSS. give the Lord Christ. The original text was probably altered by transcribers to bring it into conformity with the LXX. text of Isaiah. To "sanctify Christ" or "God" was to count His Name as holy above all other names, His fear, as the only fear which men ought to cherish, and therefore as the safeguard against all undue fear of men. The words "in your hearts" are added by the Apostle to the text of Isaiah as shewing that the "hallowing" of which he speaks should work in the root and centre of their spiritual being.

be ready always to give an answer The words imply that the disciples of Christ were not to take refuge in the silence to which fear might prompt. They were to be ready with a defence, a vindication, an apologia, for their faith and hope. And this answer was to be given not in a tone of threatening defiance, but "in meekness" as regards the interrogator, whether the questions were put officially or in private, and "in fear," partly lest the truth should suffer through any infirmities in its defenders, partly because the spirit of reverential awe towards God was the best safeguard against such infirmities.