having a good conscience; that, while you are spoken against as evildoers, they may be disappointed who curse your good manner of life in Christ.

 3:15b-16 Always be prepared to make your defence to anyone who calls you to account concerning the hope that is in you; but do so with gentleness and reverence. Keep your conscience clear, so that, when you are abused, those who revile your good behaviour in Christ may be put to shame. 