And have mercy on those who doubt (Jude 1:22)
When a person is having doubts about the Christian faith, the usual course of action is withdrawal accompanied by listening to critical and dissenting voices. That usually doesn’t end up affirming belief in Christ. What if instead of withdrawing the person got even more engaged?
Read the article Dealing with Doubt in a Fallen World to understand the reasoning behind this suggestion. (The article is long—around 8 pages when printed out.)