But in your hearts revere Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect (NIV)

But in your hearts set Christ apart as holy [and acknowledge Him] as Lord. Always be ready to give a logical defense to anyone who asks you to account for the hope that is in you, but do it courteously and respectfully. [Isa. 8:12, 13.] (AMP)

But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear: (KJV)