Submission to Christ as Lord yields courage, boldness, and fortitude in the midst of hostility. Always being ready to make a defense to everyone who asks you to give an account for the hope that is in you, yet with gentleness and reverence. The Greek term often speaks of a formal defense in a court of law. Believers should be able to give a rational explanation of their salvation and Christian faith. That indicates a tender and a gracious spirit in speaking.
Phobia is a derivative of that Greek word.
But this kind of fear refers to a healthy devotion to God, a healthy regard for truth, and a healthy respect for the person being spoken to. A Christian who can't carefully, thoughtfully, reasonably, and biblically give a clear explanation for his faith will be insecure when faced with hostility, and might be inclined to doubt his salvation. The conscience either accuses or excuses a person, acting as a source of conviction or affirmation. A good conscience says everything is well, but an evil conscience points out sin in a person's life. A believer is to live with a clear conscience so the weight of guilt won't burden him when faced with hostile criticism.