Most Christians are not convinced of their own faith. I would say 90 percent of Christians do not have a worldview, in other words a view of the world, based on the Scripture and a relationship with God. And so they cannot discern between the truth and falsehood.
Josh McDowellPaul the apostle recounted that Jesus appeared to more than 500 of His followers at one time, the majority of whom were still alive and who could confirm what Paul wrote.
Josh McDowell