Confessing Christ in a public setting is more about trusting him than about having all the answers.
In Luke 12:8-12 Jesus described how He will confess before the Father those who confess Him publicly, and deny those who deny Him. He went on to say this regarding confessing Him:
“Now when they bring you to the synagogues and authorities, do not worry about how or what you should answer, or what you should say, ‘For the Holy Spirit will teach you in that very hour what you ought to say’” – Luke 12:11-12 NKJV
So many times we worry about not having enough biblical knowledge to field a pointed question, when the main task is to trust the Holy Spirit and speak specifically of Christ. Naturally, a disciple should always be applying themselves to increase their understanding, but while on earth we’ll never have all the answers or the cleverest “come-backs”. Ours is to be faithful to Him. He’s specifically the object of our faith, He’s specifically the Rock we’re anchored to and He’s specifically the one we should simply point to. And He’s also the One others will either place faith in or not.
“In that very hour, trust…”