Having a good conscience; this may be read either:
1. Indicatively, and joined (as by some it is) to the former verse; and then the sense is: If ye be always ready to answer every one that asketh you a reason of the hope that is in you, ye shall have a good conscience: or rather:
2. Imperatively (which our translation favours); q.d. Not only be ready to make confession of your faith, but let your life and practice be correspondent to it, in keeping yourselves pure from sin, and exercising yourselves unto godliness, from whence a good conscience proceeds; here therefore the effect is put for the cause, a good conscience for a good life, Acts 23:1. That whereas they speak evil of you, &c.; the sense is, that whereas they speak evil of you, as of evil-doers, your good conversation may bear witness for you, confute their calumnies, and make them ashamed, when it appears that their accusations are false, and that they have nothing to charge upon you but your being followers of Christ. Your good conversation in Christ; i.e. that good conversation which ye lead as being in Christ; viz. according to his doctrine and example, and by the influence of his Spirit.