Did you ever notice that Jesus was constantly asking questions to those around Him? "Search the Scriptures" (Jn 5:39), especially the gospels, and notice the contexts in which He asks these questions. At times, he asks a question to elicit a response of faith (see Lk 18:41). Sometimes, he asks a question as the grand finale to a teaching (see Mt 21:31, 42). At other times, he asks a question which He knows that no one will answer, simply to drive home a point (see Mk 3:4; Mt 22:45).
Some of Jesus' most interesting questions were delivered in response to bad faith (see Mk 2:24-25). Jesus often defended the faith not so much by giving an answer; rather, He would respond to His challengers by questioning them. Jesus and the apostles did not shrink from taking authority and challenging those who challenged them.
In the same way, we who follow Jesus can take our cue from Him. Do we Christians tend to humble ourselves before those who seek to discredit us? Are we meek and humble, patiently answering all challenges to what we believe? This might be appropriate at times. However, the foundation for our Christian faith is rock-solid and time-tested. Like Jesus, we can operate from a position of confidence and authority, and question our challengers to defend their own position.
Learn from Jesus. One well-timed question from our lips may open a hostile heart forever.