I want you to know, brothers, that what has happened to me has really served to advance the gospel, so that it has become known throughout the whole imperial guard and to all the rest that my imprisonment is for Christ. And most of the brothers, having become confident in the Lord by my imprisonment, are much more bold to speak the word without fear.
Philippians 1:12-14 (ESV)
We gain confidence through Christ who provides us with the courage that shields us from the power of fear.