Faith is fragile. We may think we are strong in it, but that's only because we cultivate it daily. The faith of the two traveling to Emmaus was dashed. Talking about this man from Nazareth, this prophet and healer, being crucified was a way for them to reconstruct their faith. They didn't let crushing news stop their reconstruction. We can't either.
APPLICATION: The two on the road to Emmaus did what we can do, which is talk our faith over with a friend. (As a result of their conversation, the two met Jesus. We can, too.)